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65e8a89 Change monerod --proxy to --tx-proxy (vtnerd)
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Daemons intended for public use can be set up to require payment
in the form of hashes in exchange for RPC service. This enables
public daemons to receive payment for their work over a large
number of calls. This system behaves similarly to a pool, so
payment takes the form of valid blocks every so often, yielding
a large one off payment, rather than constant micropayments.
This system can also be used by third parties as a "paywall"
layer, where users of a service can pay for use by mining Monero
to the service provider's address. An example of this for web
site access is Primo, a Monero mining based website "paywall":
https://github.com/selene-kovri/primo
This has some advantages:
- incentive to run a node providing RPC services, thereby promoting the availability of third party nodes for those who can't run their own
- incentive to run your own node instead of using a third party's, thereby promoting decentralization
- decentralized: payment is done between a client and server, with no third party needed
- private: since the system is "pay as you go", you don't need to identify yourself to claim a long lived balance
- no payment occurs on the blockchain, so there is no extra transactional load
- one may mine with a beefy server, and use those credits from a phone, by reusing the client ID (at the cost of some privacy)
- no barrier to entry: anyone may run a RPC node, and your expected revenue depends on how much work you do
- Sybil resistant: if you run 1000 idle RPC nodes, you don't magically get more revenue
- no large credit balance maintained on servers, so they have no incentive to exit scam
- you can use any/many node(s), since there's little cost in switching servers
- market based prices: competition between servers to lower costs
- incentive for a distributed third party node system: if some public nodes are overused/slow, traffic can move to others
- increases network security
- helps counteract mining pools' share of the network hash rate
- zero incentive for a payer to "double spend" since a reorg does not give any money back to the miner
And some disadvantages:
- low power clients will have difficulty mining (but one can optionally mine in advance and/or with a faster machine)
- payment is "random", so a server might go a long time without a block before getting one
- a public node's overall expected payment may be small
Public nodes are expected to compete to find a suitable level for
cost of service.
The daemon can be set up this way to require payment for RPC services:
monerod --rpc-payment-address 4xxxxxx \
--rpc-payment-credits 250 --rpc-payment-difficulty 1000
These values are an example only.
The --rpc-payment-difficulty switch selects how hard each "share" should
be, similar to a mining pool. The higher the difficulty, the fewer
shares a client will find.
The --rpc-payment-credits switch selects how many credits are awarded
for each share a client finds.
Considering both options, clients will be awarded credits/difficulty
credits for every hash they calculate. For example, in the command line
above, 0.25 credits per hash. A client mining at 100 H/s will therefore
get an average of 25 credits per second.
For reference, in the current implementation, a credit is enough to
sync 20 blocks, so a 100 H/s client that's just starting to use Monero
and uses this daemon will be able to sync 500 blocks per second.
The wallet can be set to automatically mine if connected to a daemon
which requires payment for RPC usage. It will try to keep a balance
of 50000 credits, stopping mining when it's at this level, and starting
again as credits are spent. With the example above, a new client will
mine this much credits in about half an hour, and this target is enough
to sync 500000 blocks (currently about a third of the monero blockchain).
There are three new settings in the wallet:
- credits-target: this is the amount of credits a wallet will try to
reach before stopping mining. The default of 0 means 50000 credits.
- auto-mine-for-rpc-payment-threshold: this controls the minimum
credit rate which the wallet considers worth mining for. If the
daemon credits less than this ratio, the wallet will consider mining
to be not worth it. In the example above, the rate is 0.25
- persistent-rpc-client-id: if set, this allows the wallet to reuse
a client id across runs. This means a public node can tell a wallet
that's connecting is the same as one that connected previously, but
allows a wallet to keep their credit balance from one run to the
other. Since the wallet only mines to keep a small credit balance,
this is not normally worth doing. However, someone may want to mine
on a fast server, and use that credit balance on a low power device
such as a phone. If left unset, a new client ID is generated at
each wallet start, for privacy reasons.
To mine and use a credit balance on two different devices, you can
use the --rpc-client-secret-key switch. A wallet's client secret key
can be found using the new rpc_payments command in the wallet.
Note: anyone knowing your RPC client secret key is able to use your
credit balance.
The wallet has a few new commands too:
- start_mining_for_rpc: start mining to acquire more credits,
regardless of the auto mining settings
- stop_mining_for_rpc: stop mining to acquire more credits
- rpc_payments: display information about current credits with
the currently selected daemon
The node has an extra command:
- rpc_payments: display information about clients and their
balances
The node will forget about any balance for clients which have
been inactive for 6 months. Balances carry over on node restart.
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6fdaaba node.inl, add xmrchain.net IP to hardcoded peers (Gingeropolous)
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ec7f2ff p2p: reject invalid rpc_port in peer lists (xiphon)
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4ce40ed p2p: reject invalid pruning seeds in peer lists (moneromooo-monero)
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d4d2b5c p2p+rpc: don't skip p2p or rpc port bind failure by default (xiphon)
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3455efa ban peers sending bad pow outright (moneromooo-monero)
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added for mainnet, testnet, and stagenet.
server is owner by snipa, both snipa and I have access to it. No idea where its hosted.
xmrchain.net is a block explorer thats been around a while.
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f3b65c6 Request a thread stack size that is large enough for unbound (omartijn)
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2a7d915 Fixed i2p/tor tx flooding bug (white noise disabled) (vtnerd)
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PoW is expensive to verify, so be strict
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Unbound uses a 64 kb large character array on the stack, which
leads to a stack overflow for some libc implementations. musl
only gives 80 kb in total. This PR changes the stack size for
these threads to 1mb, which solves the segmentation fault.
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cae488d p2p: reject incoming connections to self (moneromooo-monero)
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e353e3d p2p: sanitize peer lists (moneromooo-monero)
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2e26536 p2p: move log away from global (moneromooo-monero)
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Also remove the delta time fixup, since we now ignore those
as they're attacker controlled
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It was here while debugging, and I forgot to move it away
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fcbf7b3 p2p: propagate out peers limit to payload handler (moneromooo-monero)
098aadf p2p: close the right number of connections on setting max in/out peers (moneromooo-monero)
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new cli options (RPC ones also apply to wallet):
--p2p-bind-ipv6-address (default = "::")
--p2p-bind-port-ipv6 (default same as ipv4 port for given nettype)
--rpc-bind-ipv6-address (default = "::1")
--p2p-use-ipv6 (default false)
--rpc-use-ipv6 (default false)
--p2p-require-ipv4 (default true, if ipv4 bind fails and this is
true, will not continue even if ipv6 bind
successful)
--rpc-require-ipv4 (default true, description as above)
ipv6 addresses are to be specified as "[xx:xx:xx::xx:xx]:port" except
in the cases of the cli args for bind address. For those the square
braces can be omitted.
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068fa1c p2p: delay IGP probing on startup (moneromooo-monero)
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fcfcc3a rpc: in/out peers can now return the setting's value (moneromooo-monero)
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6abaaaa remove obsolete save_graph skeleton code (moneromooo-monero)
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515ac29 p2p: store network address directly in blocked host list (moneromooo-monero)
65c4004 allow blocking whole subnets (moneromooo-monero)
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a96c1a46 cryptonote_protocol: drop peers we can't download from when syncing (moneromooo-monero)
ab361df2 p2p: add a few missing connection close calls (moneromooo-monero)
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rather than their string representation
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We might have external access without having to do this
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This can be used for fingerprinting and working out the
network topology.
Instead of sending the first N (which are sorted by last
seen time), we sent a random subset of the first N+N/5,
which ensures reasonably recent peers are used, while
preventing repeated calls from deducing new entries are
peers the target node just connected to.
The list is also randomly shuffled so the original set of
timestamps cannot be approximated.
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58585986 p2p: fix integer overflow in host bans (moneromooo-monero)
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19f8089f p2p: don't lookup seed nodes when offline (moneromooo-monero)
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This will cause DNS requests, which will block and timeout
if there is really no network connectivity
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a54e81e5 daemon: add '--no-sync' arg to optionally disable blockchain sync (xiphon)
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551104fb daemon: add --public-node mode, RPC port propagation over P2P (xiphon)
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RPC connections now have optional tranparent SSL.
An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.
SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.
Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.
To generate long term certificates:
openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT
/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.
SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
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- Support for ".onion" in --add-exclusive-node and --add-peer
- Add --anonymizing-proxy for outbound Tor connections
- Add --anonymous-inbounds for inbound Tor connections
- Support for sharing ".onion" addresses over Tor connections
- Support for broadcasting transactions received over RPC exclusively
over Tor (else broadcast over public IP when Tor not enabled).
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The blockchain prunes seven eighths of prunable tx data.
This saves about two thirds of the blockchain size, while
keeping the node useful as a sync source for an eighth
of the blockchain.
No other data is currently pruned.
There are three ways to prune a blockchain:
- run monerod with --prune-blockchain
- run "prune_blockchain" in the monerod console
- run the monero-blockchain-prune utility
The first two will prune in place. Due to how LMDB works, this
will not reduce the blockchain size on disk. Instead, it will
mark parts of the file as free, so that future data will use
that free space, causing the file to not grow until free space
grows scarce.
The third way will create a second database, a pruned copy of
the original one. Since this is a new file, this one will be
smaller than the original one.
Once the database is pruned, it will stay pruned as it syncs.
That is, there is no need to use --prune-blockchain again, etc.
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d1b3990d p2p: don't stop the idle thread when no gray peers are found (moneromooo-monero)
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a5ffc2d5 Remove boost::lexical_cast for uuid and unused uuid function (Lee Clagett)
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85665003 epee: better network buffer data structure (moneromooo-monero)
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avoids pointless allocs and memcpy
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Also add an info if not offline, since it weakens the network
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2d48861d p2p: only deinitialize what's been initialized in offline mode (moneromooo-monero)
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as per the source documentation
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This reverts commit 909398efc79cb1fa92e330e9a50a316ca5858953.
It looks like it's causing trouble with tor on some setups
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909398e p2p: connect via the bound ip, if any (moneromooo-monero)
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149da42 db_lmdb: enable batch transactions by default (stoffu)
34cb6b4 add --regtest and --fixed-difficulty for regression testing (vicsn)
9e1403e update get_info RPC and bump RPC version (vicsn)
207b66e first new functional tests (vicsn)
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on_generateblocks RPC call combines functionality from the on_getblocktemplate and on_submitblock RPC calls to allow rapid block creation. Difficulty is set permanently to 1 for regtest.
Makes use of FAKECHAIN network type, but takes hard fork heights from mainchain
Default reserve_size in generate_blocks RPC call is now 1. If it is 0, the following error occurs 'Failed to calculate offset for'.
Queries hard fork heights info of other network types
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08b85a8 cryptonote_config: add get_config to refactor x = testnet ? config::testnet::X : stagenet ? config::stagenet::X : config::X (stoffu)
0cf80ba net_node: resolve host for node addresses given via command line flags (stoffu)
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de1ffe0 p2p: warn when no incoming connections are seen for a while (moneromooo-monero)
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config::testnet::X : stagenet ? config::stagenet::X : config::X
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Those were added to the seed nodes list even when they had already
been added. Moreover, the current index was not reset after they
were added, typically causing previous seeds to be used, and some
of those fallback seeds to not be tried.
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(cherry picked from commit a7366b5feeffaeb65b217b2d6f138e0ab1c90192)
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(cherry picked from commit b16a282f97d8f6c967e8a0b1ecfd75110f095182)
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eda9fb5b p2p: fix testnet/mainnet port mixup (moneromooo-monero)
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e4646379 keccak: fix mdlen bounds sanity checking (moneromooo-monero)
2e3e90ac pass large parameters by const ref, not value (moneromooo-monero)
61defd89 blockchain: sanity check number of precomputed hash of hash blocks (moneromooo-monero)
9af6b2d1 ringct: fix infinite loop in unused h2b function (moneromooo-monero)
8cea8d0c simplewallet: double check a new multisig wallet is multisig (moneromooo-monero)
9b98a6ac threadpool: catch exceptions in dtor, to avoid terminate (moneromooo-monero)
24803ed9 blockchain_export: fix buffer overflow in exporter (moneromooo-monero)
f3f7da62 perf_timer: rewrite to make it clear there is no division by zero (moneromooo-monero)
c6ea3df0 performance_tests: remove add_arg call stray extra param (moneromooo-monero)
fa6b4566 fuzz_tests: fix an uninitialized var in setup (moneromooo-monero)
03887f11 keccak: fix sanity check bounds test (moneromooo-monero)
ad11db91 blockchain_db: initialize m_open in base class ctor (moneromooo-monero)
bece67f9 miner: restore std::cout precision after modification (moneromooo-monero)
1aabd14c db_lmdb: check hard fork info drop succeeded (moneromooo-monero)
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2e584dcb p2p: do not try to connect to peers in offline mode (moneromooo-monero)
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Coverity 136394 136397 136409 136526 136529 136533 175302
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It was already possible to limit outgoing connections. One might want
to do this on home network connections with high bandwidth but low
usage caps.
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This rename is needed so that delete_in_connections can be added.
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This is needed so that a max_in_connection_count can be added.
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fd1dfac5 p2p: don't lookup seed IPs if using an exclusive peer (moneromooo-monero)
b50182ae p2p: don't connect to seeds if using an exclusive peer (moneromooo-monero)
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d28c388f p2p: stop net server before closing starting connections (moneromooo-monero)
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As a followon side effect, this makes a lot of inline code
included only in particular cpp files (and instanciated
when necessary.
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abebe392 rpc: add offline state in info rpc (moneromooo-monero)
7696e849 core: make --offline also disable DNS lookups (moneromooo-monero)
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This fixes a hang on exit due to race where a connection adds
itself to the server after the starting connections are closed,
but before the net server marks itself as stopped.
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Deleted 3 out of 4 calls to method connection_basic::sleep_before_packet
that were erroneous / superfluous, which enabled the elimination of a
"fudge" factor of 2.1 in connection_basic::set_rate_up_limit;
also ended the multiplying of limit values and numbers of bytes
transferred by 1024 before handing them over to the global throttle
objects
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Those have no reason to be in a generic module
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The commands handler must not be destroyed before the config
object, or we'll be accessing freed memory.
An earlier attempt at using boost::shared_ptr to control object
lifetime turned out to be very invasive, though would be a
better solution in theory.
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- internal nullptr checks
- prevent modifications to network_address (shallow copy issues)
- automagically works with any type containing interface functions
- removed fnv1a hashing
- ipv4_network_address now flattened with no base class
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054054c9 p2p: disable gray list housekeeping when an exclusive node is given (moneromooo-monero)
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ef005f5e p2p: add a couple early outs when the stop signal is received (moneromooo-monero)
80d361c7 abstract_tcp_server2: improve tracking/cancelling of early connections (moneromooo-monero)
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Exclusive nodes may be used for privacy reasons, and thus we don't
want to connect to other nodes, even for checking connectivity.
See https://github.com/monero-project/monero/issues/2346
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Fix sync wedge corner case:
It could happen if a connection went into standby mode, while
it was the one which had requested the next span, and that span
was still waiting for the data, and that peer is not on the
main chain. Other peers can then start asking for that data
again and again, but never get it as only that forked peer does.
And various other fixes
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This avoids quicker exit
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7fdc178a p2p: fix random peer index being too large (moneromooo-monero)
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cb2d5110 Tweak net logs so we get more info on why networking can't start (moneromooo-monero)
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This should prevent "silent" failures to start
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This avoids failing to connect to the network in case all
known peers are unavailable (which can happen if the peer
list is small).
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This fixes nodes not being able to connect to nodes which use
recent code. While there, init peer_id too.
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158c3ecf core: thread most of handle_incoming_tx (moneromooo-monero)
f57ee382 cryptonote_protocol: retry stale spans early (moneromooo-monero)
90df52e1 cryptonote_protocol: light cleanup (moneromooo-monero)
84e23156 cryptonote_protocol: avoid spurious SYNCHRONIZED OK messages (moneromooo-monero)
5be43fcd cryptonote_protocol_handler: sync speedup (moneromooo-monero)
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04ebfbfe p2p: close connections when exiting (moneromooo-monero)
9a10148c p2p: fix thread leak (moneromooo-monero)
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A block queue is now placed between block download and
block processing. Blocks are now requested only from one
peer (unless starved).
Includes a new sync_info coommand.
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This ensures they don't leak if they were in the middle of an
async operation.
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This avoids having to include p2p_protocol_defs.h in util.h,
as util.h is used a lot, and p2p_protocol_defs.h includes
a lot of other things that most users don't need.
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Since I had to add an ID to the derived classes anyway,
this can be used instead. This removes an apparently
pointless warning from CLANG too.
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07c4276c Don't issue a new timedsync while one is already in progress (Howard Chu)
cf3a376c Don't timeout a slow operation that's making progress (Howard Chu)
340830de Fix PR#2039 (Howard Chu)
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A timedsync is issued every minute on a connection, but the input
tineout is 2 minutes. This means a new sync request could be issued
while a slow sync request was already in progress. The additional
request will further clog the network on a slow connection, and
cause a premature timeout.
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All code which was using ip and port now uses a new IPv4 object,
subclass of a new network_address class. This will allow easy
addition of I2P addresses later (and also IPv6, etc).
Both old style and new style peer lists are now sent in the P2P
protocol, which is inefficient but allows peers using both
codebases to talk to each other. This will be removed in the
future. No other subclasses than IPv4 exist yet.
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8277e67f Add anchor connections (Miguel Herranz)
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In case the DNS seed(s) is/are down, which would otherwise
cause the fallback seeds to never be used. Also if the seeds
resolve to too few IPs.
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Prevents the system from always picking the gray peers with the most
recent last_seen.
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They're now used by core to determine the data directory to use
for the txpool directory.
This fixes an assert in the core tests, which don't use the RPC
server, which normally initializes the P2P code.
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Based on https://eprint.iacr.org/2015/263.pdf 4. Anchor connections.
Peer list serialisation version bumped to 5.
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ca94d0a4 Separate data per P2P port (Miguel Herranz)
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poolstate.bin and p2pstate.bin are stored in .bitmonero/ if the default
P2P port is being used.
If another port is used both files are stored in
.bitmonero/PORTNUMBER/.
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4cdf0a35 p2p: always recreate a new peer id on startup (moneromooo-monero)
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f8b97aef p2p: show ban/unban logs by default again (moneromooo-monero)
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This prevents easy fingerprinting when you change IPs, and
will be a must when kovri gets used.
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A random peer from the gray peer list is selected and a connection is
made to check if the peer is alive.
If the connection and handshake are successful the peer is promoted to
the white peer list, in case of failure the peer is evicted from the
gray peer list.
The connection is closed after the check in either case.
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0e0e6c5f Reduce to one connection per IP (Miguel Herranz)
3f269e98 Limit incoming connections from the same IP (Miguel Herranz)
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This replaces the epee and data_loggers logging systems with
a single one, and also adds filename:line and explicit severity
levels. Categories may be defined, and logging severity set
by category (or set of categories). epee style 0-4 log level
maps to a sensible severity configuration. Log files now also
rotate when reaching 100 MB.
To select which logs to output, use the MONERO_LOGS environment
variable, with a comma separated list of categories (globs are
supported), with their requested severity level after a colon.
If a log matches more than one such setting, the last one in
the configuration string applies. A few examples:
This one is (mostly) silent, only outputting fatal errors:
MONERO_LOGS=*:FATAL
This one is very verbose:
MONERO_LOGS=*:TRACE
This one is totally silent (logwise):
MONERO_LOGS=""
This one outputs all errors and warnings, except for the
"verify" category, which prints just fatal errors (the verify
category is used for logs about incoming transactions and
blocks, and it is expected that some/many will fail to verify,
hence we don't want the spam):
MONERO_LOGS=*:WARNING,verify:FATAL
Log levels are, in decreasing order of priority:
FATAL, ERROR, WARNING, INFO, DEBUG, TRACE
Subcategories may be added using prefixes and globs. This
example will output net.p2p logs at the TRACE level, but all
other net* logs only at INFO:
MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE
Logs which are intended for the user (which Monero was using
a lot through epee, but really isn't a nice way to go things)
should use the "global" category. There are a few helper macros
for using this category, eg: MGINFO("this shows up by default")
or MGINFO_RED("this is red"), to try to keep a similar look
and feel for now.
Existing epee log macros still exist, and map to the new log
levels, but since they're used as a "user facing" UI element
as much as a logging system, they often don't map well to log
severities (ie, a log level 0 log may be an error, or may be
something we want the user to see, such as an important info).
In those cases, I tried to use the new macros. In other cases,
I left the existing macros in. When modifying logs, it is
probably best to switch to the new macros with explicit levels.
The --log-level options and set_log commands now also accept
category settings, in addition to the epee style log levels.
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net_node.inl, completely adandon boost/archive/binary_oarchive.hpp
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f4772bae Fix a few minor typos (Pierre Boyer)
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3f7d6fb5 Fix delayed exit when syncing (moneromooo-monero)
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7c0dd5e4 net_node: drop connections from banned IPs after looping through connections (moneromooo-monero)
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This keeps the connections lock just for the time of looping
and adding connectoins to a list, and the dropping happens
after it. This should avoid lengthy delays waiting for the
connections lock.
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Added a new command to the P2P protocol definitions to allow querying for support flags.
Implemented handling of new support flags command in net_node. Changed for_each callback template to include support flags. Updated print_connections command to show peer support flags.
Added p2p constant for signaling fluffy block support.
Added get_pool_transaction function to cryptnote_core.
Added new commands to cryptonote protocol for relaying fluffy blocks.
Implemented handling of fluffy block command in cryptonote protocol.
Enabled fluffy block support in node initial configuration.
Implemented get_testnet function in cryptonote_core.
Made it so that fluffy blocks only run on testnet.
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The default port is then used
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If there is no comms error, but the response is not as expected,
close would not be called.
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and all other associated IPC
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std::thread crashes on (at least) ARMv6 g++ 4.8/4.9
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One loop was not paying attention to the stop signal, and could
end up looping forever
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63cb1a5 move another non user useful log to L1 (moneromooo-monero)
02827d5 p2p: minor log formatting fix (moneromooo-monero)
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Remove trailing whitespace in same files.
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336b375 Register daemon command line arguments to core if they're used in core (moneromooo-monero)
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This fixes coretests, which does not register daemon specific arguments,
but uses core, which uses those arguments. Also gets rid of an unwanted
dependency on daemon code from core.
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2c83055 net_node: add a --offline argument (moneromooo-monero)
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It will not try to connect to the monero network, nor listen
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Clear any partially loaded data, and start with a default config
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m_blocked_ips now stores the unblocking time, rather than the
blocking time.
Also change > to >=, since banning for 0 seconds should not ban
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With minor cleanup and fixes (spelling, indent) by moneromooo
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upnpDiscover() takes a new argument for TTL.
Use the suggested default of 2.
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Each thread can use the same resolver.
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Bockchain:
1. Optim: Multi-thread long-hash computation when encountering groups of blocks.
2. Optim: Cache verified txs and return result from cache instead of re-checking whenever possible.
3. Optim: Preload output-keys when encoutering groups of blocks. Sort by amount and global-index before bulk querying database and multi-thread when possible.
4. Optim: Disable double spend check on block verification, double spend is already detected when trying to add blocks.
5. Optim: Multi-thread signature computation whenever possible.
6. Patch: Disable locking (recursive mutex) on called functions from check_tx_inputs which causes slowdowns (only seems to happen on ubuntu/VMs??? Reason: TBD)
7. Optim: Removed looped full-tx hash computation when retrieving transactions from pool (???).
8. Optim: Cache difficulty/timestamps (735 blocks) for next-difficulty calculations so that only 2 db reads per new block is needed when a new block arrives (instead of 1470 reads).
Berkeley-DB:
1. Fix: 32-bit data errors causing wrong output global indices and failure to send blocks to peers (etc).
2. Fix: Unable to pop blocks on reorganize due to transaction errors.
3. Patch: Large number of transaction aborts when running multi-threaded bulk queries.
4. Patch: Insufficient locks error when running full sync.
5. Patch: Incorrect db stats when returning from an immediate exit from "pop block" operation.
6. Optim: Add bulk queries to get output global indices.
7. Optim: Modified output_keys table to store public_key+unlock_time+height for single transaction lookup (vs 3)
8. Optim: Used output_keys table retrieve public_keys instead of going through output_amounts->output_txs+output_indices->txs->output:public_key
9. Optim: Added thread-safe buffers used when multi-threading bulk queries.
10. Optim: Added support for nosync/write_nosync options for improved performance (*see --db-sync-mode option for details)
11. Mod: Added checkpoint thread and auto-remove-logs option.
12. *Now usable on 32-bit systems like RPI2.
LMDB:
1. Optim: Added custom comparison for 256-bit key tables (minor speed-up, TBD: get actual effect)
2. Optim: Modified output_keys table to store public_key+unlock_time+height for single transaction lookup (vs 3)
3. Optim: Used output_keys table retrieve public_keys instead of going through output_amounts->output_txs+output_indices->txs->output:public_key
4. Optim: Added support for sync/writemap options for improved performance (*see --db-sync-mode option for details)
5. Mod: Auto resize to +1GB instead of multiplier x1.5
ETC:
1. Minor optimizations for slow-hash for ARM (RPI2). Incomplete.
2. Fix: 32-bit saturation bug when computing next difficulty on large blocks.
[PENDING ISSUES]
1. Berkely db has a very slow "pop-block" operation. This is very noticeable on the RPI2 as it sometimes takes > 10 MINUTES to pop a block during reorganization.
This does not happen very often however, most reorgs seem to take a few seconds but it possibly depends on the number of outputs present. TBD.
2. Berkeley db, possible bug "unable to allocate memory". TBD.
[NEW OPTIONS] (*Currently all enabled for testing purposes)
1. --fast-block-sync arg=[0:1] (default: 1)
a. 0 = Compute long hash per block (may take a while depending on CPU)
b. 1 = Skip long-hash and verify blocks based on embedded known good block hashes (faster, minimal CPU dependence)
2. --db-sync-mode arg=[[safe|fast|fastest]:[sync|async]:[nblocks_per_sync]] (default: fastest:async:1000)
a. safe = fdatasync/fsync (or equivalent) per stored block. Very slow, but safest option to protect against power-out/crash conditions.
b. fast/fastest = Enables asynchronous fdatasync/fsync (or equivalent). Useful for battery operated devices or STABLE systems with UPS and/or systems with battery backed write cache/solid state cache.
Fast - Write meta-data but defer data flush.
Fastest - Defer meta-data and data flush.
Sync - Flush data after nblocks_per_sync and wait.
Async - Flush data after nblocks_per_sync but do not wait for the operation to finish.
3. --prep-blocks-threads arg=[n] (default: 4 or system max threads, whichever is lower)
Max number of threads to use when computing long-hash in groups.
4. --show-time-stats arg=[0:1] (default: 1)
Show benchmark related time stats.
5. --db-auto-remove-logs arg=[0:1] (default: 1)
For berkeley-db only. Auto remove logs if enabled.
**Note: lmdb and berkeley-db have changes to the tables and are not compatible with official git head version.
At the moment, you need a full resync to use this optimized version.
[PERFORMANCE COMPARISON]
**Some figures are approximations only.
Using a baseline machine of an i7-2600K+SSD+(with full pow computation):
1. The optimized lmdb/blockhain core can process blocks up to 585K for ~1.25 hours + download time, so it usually takes 2.5 hours to sync the full chain.
2. The current head with memory can process blocks up to 585K for ~4.2 hours + download time, so it usually takes 5.5 hours to sync the full chain.
3. The current head with lmdb can process blocks up to 585K for ~32 hours + download time and usually takes 36 hours to sync the full chain.
Averate procesing times (with full pow computation):
lmdb-optimized:
1. tx_ave = 2.5 ms / tx
2. block_ave = 5.87 ms / block
memory-official-repo:
1. tx_ave = 8.85 ms / tx
2. block_ave = 19.68 ms / block
lmdb-official-repo (0f4a036437fd41a5498ee5e74e2422ea6177aa3e)
1. tx_ave = 47.8 ms / tx
2. block_ave = 64.2 ms / block
**Note: The following data denotes processing times only (does not include p2p download time)
lmdb-optimized processing times (with full pow computation):
1. Desktop, Quad-core / 8-threads 2600k (8Mb) - 1.25 hours processing time (--db-sync-mode=fastest:async:1000).
2. Laptop, Dual-core / 4-threads U4200 (3Mb) - 4.90 hours processing time (--db-sync-mode=fastest:async:1000).
3. Embedded, Quad-core / 4-threads Z3735F (2x1Mb) - 12.0 hours processing time (--db-sync-mode=fastest:async:1000).
lmdb-optimized processing times (with per-block-checkpoint)
1. Desktop, Quad-core / 8-threads 2600k (8Mb) - 10 minutes processing time (--db-sync-mode=fastest:async:1000).
berkeley-db optimized processing times (with full pow computation)
1. Desktop, Quad-core / 8-threads 2600k (8Mb) - 1.8 hours processing time (--db-sync-mode=fastest:async:1000).
2. RPI2. Improved from estimated 3 months(???) into 2.5 days (*Need 2AMP supply + Clock:1Ghz + [usb+ssd] to achieve this speed) (--db-sync-mode=fastest:async:1000).
berkeley-db optimized processing times (with per-block-checkpoint)
1. RPI2. 12-15 hours (*Need 2AMP supply + Clock:1Ghz + [usb+ssd] to achieve this speed) (--db-sync-mode=fastest:async:1000).
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c44755a Build seed node list without duplicates (warptangent)
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Add fix for compile error with multiple uses of peerid_type (uint64_t)
variable in lambda expression.
- known GCC issue: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65843
epee: replace return value of nullptr for expected boolean with false.
Fixes #231.
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The random selection of a node shouldn't favor repeats that occur in the
hardcoded and DNS seed node lists.
Remove hardcoded ":18080" address which gives parse error.
Test: bitmonerod --log-level 2
The seed node list displayed at startup shouldn't show duplicate
addresses (includes port).
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618f20c Network 1.7; Quieted the debug a bit. (rfree2monero)
391c7f9 Utils: use const, document dbg. Less default debug (rfree2monero)
44f4234 [fix] mac os x includes std::random... (rfree2monero)
162c993 Network 1.6: network limits, logging, +doxy (rfree2monero)
a3b2226 my changelog (rfree2monero)
2900b1e doxygen files (rfree2monero)
1489310 doxygen related tool (rfree2monero)
f9dba47 added windows_stream.* console colors (rfree2monero)
c511abf remerged; commands JSON. logging upgrade. doxygen (rfree2monero)
f79821a fix locking in count-peers thread (2) (rfree2monero)
0198ffb 2014 network limit 1.3 fix log/path/data +utils (rfree2monero)
ae2a506 2014 network limit 1.2 +utils +toc -doc -drmonero (rfree2monero)
0f06dca fixed size_t on windows (rfree2monero)
39fc63f removed not needed <netinet/in.h> (rfree2monero)
5ce4256 2014 network limit 1.1 +utils +toc -doc -drmonero (rfree2monero)
eabb519 2014 network limit 1.0a +utils +toc -doc -drmonero (rfree2monero)
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