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172016-04-13T02:20:56 <GitHub177> [bitcoin] mrCertified opened pull request #7867: deleted Configure.ac restore bits to all networks(%master%masterCode[{rLi}]) (master...patch-1) https://github.com/bitcoin/bitcoin/pull/7867
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212016-04-13T02:54:59 <GitHub91> [bitcoin] theuni opened pull request #7868: net: Split DNS resolving functionality out of net structures (master...net-cleanup-resolve) https://github.com/bitcoin/bitcoin/pull/7868
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542016-04-13T06:23:52 <cryptocoder> hi everyone
552016-04-13T06:24:38 <cryptocoder> not sure if this is the right place for this, but how come the windows release for core 0.12 does not seem to have zmq support in it?
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582016-04-13T06:38:14 <jonasschnelli> cryptocoder: IIRC there where problems with static linking...
592016-04-13T06:38:22 * jonasschnelli is searching the exact reason
602016-04-13T06:38:50 <jonasschnelli> cryptocoder: https://github.com/bitcoin/bitcoin/issues/6681
612016-04-13T06:40:21 <cryptocoder> ah! thank you jonasschnelli. I was hoping iâm not missing something obvious
622016-04-13T06:40:58 <jonasschnelli> cryptocoder: I think you could hack the depends/ build system to link it dynamic.
632016-04-13T06:41:28 <jonasschnelli> Or compile it on a window machine (not cc), but not sure how this exactly works.
642016-04-13T06:43:14 <jonasschnelli> sipa, wumpus: reindex with LMDB took ~11h (same machine where a full sync with master took 2h20'). Now reindexing the master levelDB node.
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782016-04-13T09:12:50 <jonasschnelli> wumpus: LMDB reindex with -dbcache=9000: >11h, levelDB with -dbcache=8000: 2h25'.
792016-04-13T09:13:07 <jonasschnelli> (the IBD from random peers was a couple of minutes faster... i'm confused)
802016-04-13T09:13:33 <jonasschnelli> I wonder where we the performance bottleneck with LMDB is.
812016-04-13T09:14:22 <sipa> that's very strange!
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842016-04-13T09:28:54 <btcdrak> Completely backwards
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862016-04-13T09:30:32 <sipa> especially since neither should be touched the database at all
872016-04-13T09:30:42 <sipa> with such dbcache
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1202016-04-13T10:35:05 <shangzhou> sipa:http://bitcoin.sipa.be/ data is not up to date
1212016-04-13T10:38:57 <sipa> shangzhou: thanks, fixing
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1232016-04-13T10:54:06 <sipa> shangzhou: done
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1252016-04-13T11:04:02 <shangzhou> thanks @sipa
1262016-04-13T11:04:42 <sipa> i upgraded my node to 0.12 and the new rpcauth mechanism, but didn't give the credentials to the script generating the website
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1442016-04-13T11:43:40 <wumpus> jonasschnelli: interesting - so a reindex is slow with LMDB, but a sync from another node is fast? Greg did a benchmark with a sync from another node and LMDB came out much faster: https://github.com/laanwj/bitcoin/tree/2016_04_mdb#x86_64 . Also wonder where the bottleneck is, but will add it to the performance results
1452016-04-13T11:44:18 <jonasschnelli> wumpus: Both are slower. IBD and reindex.
1462016-04-13T11:44:25 <wumpus> okay
1472016-04-13T11:44:41 <wumpus> have you tried with the default dbcache as well?
1482016-04-13T11:44:58 <wumpus> maybe the 5GB write transaction is what gets it
1492016-04-13T11:44:58 <jonasschnelli> No... you mean a reindex with default dbache?
1502016-04-13T11:45:24 <wumpus> yes. You've done so with dbcache 9000, which means it fills to about ~5gb without using the database, then it writes everything at once
1512016-04-13T11:45:36 <wumpus> lmdb seems to shine in read latency, but it could be the big write is slow
1522016-04-13T11:45:50 <wumpus> with such a large dbcache it never reads so that part isn't measured
1532016-04-13T11:46:23 <jonasschnelli> wumpus: From looking at the "log speed" (very efficient benchmark technique :) ), lmdb seems to be slower during non-write operations.
1542016-04-13T11:46:43 <jonasschnelli> But i'll do now compare a reindex with no other options.
1552016-04-13T11:46:57 <wumpus> but with such a high dbcache, syncing from scratch, it doesn't touch the database at all
1562016-04-13T11:47:12 <jonasschnelli> That is what is really strange...
1572016-04-13T11:47:25 <jonasschnelli> maybe another change from your lmdb branch causes this.
1582016-04-13T11:47:33 <jonasschnelli> Haven't had time to debug it tough.
1592016-04-13T11:47:35 <wumpus> if everyone used dbcache=9000 we wouldn't need a database at all, we could just store the utxo set in a linear file
1602016-04-13T11:48:41 <jonasschnelli> Indeed. Just hope there is no crash before the big write. :)
1612016-04-13T11:48:49 <sipa> jonasschnelli: can you run with debug=bench, and show the resulting debug.log?
1622016-04-13T11:49:01 <jonasschnelli> sipa: ah. Right. Let me do that.
1632016-04-13T11:49:27 * jonasschnelli is shutting down bitcoind with -dbcache=9000,... waits...
1642016-04-13T11:50:22 <sipa> --- 3 hours later ---
1652016-04-13T11:51:10 <jonasschnelli> Hei! There is a SSD! :)
1662016-04-13T11:51:35 <jonasschnelli> Example bench (lmdb): height: 82804, Connect total: 0.14ms [22.08s]
1672016-04-13T11:51:48 <jonasschnelli> Verify 0 txins: 0.03ms (0.000ms/txin) [15.22s], Index writing: 0.05ms [3.19s]
1682016-04-13T11:51:51 <jonasschnelli> Maybe index writing?
1692016-04-13T11:52:02 <wumpus> height 82804 isn't very interesting yet :)
1702016-04-13T11:52:14 <jonasschnelli> Yeah. Can't start top down. :)
1712016-04-13T11:53:24 <wumpus> but anyhow in one light I like your result jonasschnelli, it would mean that leveldb is ok+ and there's no need to even spend time investigationg switching to something else
1722016-04-13T11:54:15 <wumpus> if both sqlite and lmdb came out slower - then again Greg's benchmark showed something completely different that's curious
1732016-04-13T11:54:50 <wumpus> you're using a SSD? don't know what his storage device was
1742016-04-13T11:55:39 <sipa> except if lmdb's final full UTXO set dump took ~9h longer than leveldb's, i can't explain jonasschnelli's result
1752016-04-13T11:56:15 <jonasschnelli> Yes. Lets first find out where the time/cycles is/are consumed.
1762016-04-13T11:57:46 <jonasschnelli> wumpus: Yes. I'm using SSD. The write speed is somewhere around 1GB/s.
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2232016-04-13T14:01:27 <jonasschnelli> Verify 1245 txins: 131.58ms (0.106ms/txin) [6447.02s]
2242016-04-13T14:01:34 <jonasschnelli> Is the value in the [] the total value so far?
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2262016-04-13T14:03:06 <sipa> yes
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2282016-04-13T14:05:25 <jonasschnelli> Running two hours so far. Looks like most time is consumed for verify (as expected). But still not clear why lmdb takes ~5 times longer...
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2312016-04-13T14:22:01 <jonasschnelli> Current Master at block 200'000: Connect total: 33.82ms [331.59s]
2322016-04-13T14:22:14 <jonasschnelli> LMDB at block 200'000: Connect total: 125.55ms [1466.35s]
2332016-04-13T14:22:43 <sipa> are you sure the LMDB is with dbcache set high?
2342016-04-13T14:22:45 * jonasschnelli is checking if the wumpus lmdb branch uses libsecp
2352016-04-13T14:23:00 <sipa> jonasschnelli: show me the verify lines
2362016-04-13T14:23:00 <jonasschnelli> no. Now its with default dbcache
2372016-04-13T14:23:09 <sipa> both leveldb and lmdb?
2382016-04-13T14:23:13 <jonasschnelli> yes.
2392016-04-13T14:23:16 <sipa> oh, ok
2402016-04-13T14:23:25 <jonasschnelli> LMDB block 200k: Verify 1231 txins: 121.49ms (0.099ms/txin) [1385.86s
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2422016-04-13T14:23:49 <jonasschnelli> leveldb: Verify 1231 txins: 28.88ms (0.023ms/txin) [262.67s]
2432016-04-13T14:24:09 <sipa> are they running with the same -par?
2442016-04-13T14:24:20 <jonasschnelli> Yes. Passed only -debug=bench
2452016-04-13T14:24:52 <jonasschnelli> nononono!
2462016-04-13T14:25:23 <jonasschnelli> lmdb node -> git branch -> master!
2472016-04-13T14:25:32 <sipa> ?
2482016-04-13T14:25:55 <jonasschnelli> I'm actually not testing against LMDB i'm testing again non-libsecp-master from nov 1st!
2492016-04-13T14:26:01 <jonasschnelli> Damit!
2502016-04-13T14:26:06 <sipa> lol
2512016-04-13T14:26:19 <sipa> libsecp was merged on nov 5th :)
2522016-04-13T14:26:43 <sipa> thank for benchmarking the improvements we've made the past 5 months, then... they turn out to be significant
2532016-04-13T14:26:47 <jonasschnelli> Somewhere during git re-set I forget to pass a "git checkout 2016_04_mdb".
2542016-04-13T14:29:22 <GitHub190> [bitcoin] mrbandrews opened pull request #7871: Manual block file pruning. (master...ba-manual6) https://github.com/bitcoin/bitcoin/pull/7871
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2712016-04-13T15:04:19 <sdaftuar> so, MAX_OPS_PER_SCRIPT includes op codes not executed? i didn't expect that.
2722016-04-13T15:05:26 <Chris_Stewart_5> ^^^^
2732016-04-13T15:05:55 <Chris_Stewart_5> even more interesting, if MAST is implemented what does that mean???
2742016-04-13T15:06:22 <Chris_Stewart_5> if I understasnd correctly MAST only reveals branches of our control structure that are actually executed
2752016-04-13T15:06:27 <sipa> exactly
2762016-04-13T15:06:36 <sipa> and for the ones not executed, you give their hash
2772016-04-13T15:07:01 <Chris_Stewart_5> sipa: Does MAST change the data structure from a List to a Tree inside of interpreter?
2782016-04-13T15:07:09 <sipa> that depends on the implementation
2792016-04-13T15:07:21 <sipa> it's just a generic idea
2802016-04-13T15:07:31 <sipa> i haven't looked at jl2012's specific proposal
2812016-04-13T15:08:26 <Chris_Stewart_5> sipa: Going off what we were talking about yesterday, are we constrained to realistically implementing this as a list for fear of unintended consensus changes?
2822016-04-13T15:08:37 <sipa> no
2832016-04-13T15:08:49 <sipa> no script versions can easily use a completely independent interpreter
2842016-04-13T15:08:54 <sipa> *new script versions
2852016-04-13T15:08:57 <Chris_Stewart_5> ahh ok
2862016-04-13T15:10:54 <jl2012> sipa: It's like your tree signature. I just compact everyone to become 3 arguments: position, path, script . (Actually I borrowed your original segwit code when the commitment was a Merkle tree)
2872016-04-13T15:13:05 <jl2012> and the depth is implied by the size of path
2882016-04-13T15:14:59 <jl2012> Chris_Stewart_5: it's very similar to P2SH and P2WSH. Just with 2 extra arguments
2892016-04-13T15:16:04 <Chris_Stewart_5> jl2012: I understand that part, I for specific implementation details I"m getting caught up on 'Position' and 'Path' and how they are different
2902016-04-13T15:16:28 <Chris_Stewart_5> It seems that if you have the path that the script takes in the tree you could derive its position..
2912016-04-13T15:17:17 <jl2012> First you divide the size of Path by 32, which is the Depth of the tree
2922016-04-13T15:17:52 <instagibbs> Chris_Stewart_5, I believe path is the hashes in the tree, the position will tell you how to build the branch
2932016-04-13T15:18:08 <instagibbs> jl2012, you might want to make it explicit, as I had trouble understanding it first go around as well
2942016-04-13T15:18:16 <instagibbs> and if I'm wrong, doubly so :P
2952016-04-13T15:18:34 <jl2012> instagibbs, yes, you are right
2962016-04-13T15:18:38 <Chris_Stewart_5> hmm ok
2972016-04-13T15:18:58 <instagibbs> I had to read between the lines tbh, since path had to be multiple of 32 bytes, i inferred it was sha hash
2982016-04-13T15:19:25 <jl2012> for Depth (d), you may have at most 2^d possible Position
2992016-04-13T15:19:45 <jl2012> Position = 0 means the leftmost position in the tree
3002016-04-13T15:20:11 <Chris_Stewart_5> jl2012: Leftmost... what exactly doe that mean? THe left most leaf node if you were to draw the tree out?
3012016-04-13T15:20:17 <instagibbs> yes
3022016-04-13T15:20:22 <jl2012> yes
3032016-04-13T15:20:45 <jl2012> same as the Merkle Root in the block header
3042016-04-13T15:21:08 <instagibbs> jl2012, mind if I write a clarification text? do I PR directly against the bip repo or yours?
3052016-04-13T15:21:48 <jl2012> instagibbs, please feel free, just a direct PR to BIP repo, thanks
3062016-04-13T15:23:32 <Chris_Stewart_5> So path is essentially a vector of sha256 hashes.. why do we exactly need the position arg again? instagibbs said for building the branch, can you be more explicit than that? Some how reconstructing the script from the hashes?
3072016-04-13T15:25:07 <sipa> Chris_Stewart_5: if your leaves are (a,b,c,d) then root=H(H(a,b),H(c,d)), right?
3082016-04-13T15:25:15 <Chris_Stewart_5> yes
3092016-04-13T15:25:27 <sipa> if you want leaf b, you need to reveal a and H(c,d), right?
3102016-04-13T15:25:40 <Chris_Stewart_5> yes
3112016-04-13T15:25:40 <sipa> so your path would be (a,H(c,d))
3122016-04-13T15:26:06 <sipa> if you want leaf c, however, you reveal (d,H(a,b))
3132016-04-13T15:26:35 <Chris_Stewart_5> so position = 3?
3142016-04-13T15:26:49 <sipa> if you reveal b, position = 1
3152016-04-13T15:26:52 <sipa> if you reveal c, position = 2
3162016-04-13T15:26:57 <sipa> etc
3172016-04-13T15:26:58 <Chris_Stewart_5> ahh zero based index
3182016-04-13T15:27:02 <Chris_Stewart_5> gotcha. Thanks.
3192016-04-13T15:27:03 <sipa> of course :p
3202016-04-13T15:27:34 * instagibbs fortran user detected
3212016-04-13T15:28:27 <Chris_Stewart_5> lol
3222016-04-13T15:29:11 <jl2012> programmers count from 0
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3242016-04-13T15:31:05 <Chris_Stewart_5> I think I forgot to turn on the CS part of my brain this morning... it was almost like I was a normal person for a while :P
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3262016-04-13T15:31:41 <Chris_Stewart_5> *looks around for more coffee*
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3402016-04-13T15:49:33 <instagibbs> jl2012, https://github.com/bitcoin/bips/pull/369
3412016-04-13T15:49:35 <instagibbs> let me know of quibbles etc
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3432016-04-13T15:51:34 <jl2012> thanks!
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3472016-04-13T15:52:52 <instagibbs> the merkle branch also has to be "minimal", but I figure anyone who skims the merkle root function would arrive at that
3482016-04-13T15:53:04 <instagibbs> and really should just copypasta that function if need be
3492016-04-13T15:53:41 <instagibbs> maybe branch singular already means that, no idea
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3532016-04-13T15:59:54 <wumpus> jonasschnelli: hahah oops! good to know that's the issue, that was an old branch
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3552016-04-13T16:02:13 <wumpus> I remember having made a similar mistake at least once, testing another branch then I thought I was testing, then spending quite some time debuggin why it didnt work as expected. I think around the time of the boost to evhttpd switch.
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3602016-04-13T16:09:00 <jl2012> instagibbs: what do you mean by minimal?
3612016-04-13T16:11:18 <instagibbs> it only deals with the nodes it needs to compute a single path
3622016-04-13T16:14:47 <jl2012> I think it's implied by the design
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3652016-04-13T16:32:52 <Chris_Stewart_5> probably better to be explicit..
3662016-04-13T16:34:33 <instagibbs> Copying and pasting the tiny function call is pretty explicit and no work
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3722016-04-13T16:55:51 <jl2012> Chris_Stewart_5, instagibbs: more comments added to the reference implementation https://github.com/jl2012/bips/blob/bip114ref/bip-0114.mediawiki#Reference_Implementation
3732016-04-13T16:56:25 <instagibbs> ACK :)
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4412016-04-13T19:54:32 <jonasschnelli> Now correct: LMDB branch sync from random peers took 2h 30min up to progress=1
4422016-04-13T19:54:34 *** nkuttler_ is now known as nkuttler
4432016-04-13T19:54:43 <jonasschnelli> Now comparing reindex with default dbcache
4442016-04-13T19:56:44 <jonasschnelli> First shutdown of LMDB IBDed node with dbcache=9000 took just a couple of seconds (write speed didn't felt different to leveldb).
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4772016-04-13T20:20:23 <GitHub79> [bitcoin] morcos opened pull request #7874: Improve AlreadyHave (master...speedAlreadyHave) https://github.com/bitcoin/bitcoin/pull/7874
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5312016-04-13T23:38:26 <cfields_> mm, what's the real-world use-case for getaddednodeinfo rpc?
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5342016-04-13T23:39:08 <cfields_> the resolving logic is kinda wonky, and i'm not sure it's worth trying to maintain compatibility with the net refactor
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5362016-04-13T23:42:34 <cfields_> BlueMatt_: ^^. Looks like you added it. In particular, the issue is that it (for dns entires) it does a resolve in the rpc, though that doesn't represent the ips that the network thread will end up trying
5372016-04-13T23:44:55 <cfields_> so I'm not sure that it's really worth trying to enumerate them. seems like keeping a map of dns->resolved would be enough to determine if a dns entry is connected or not, which i think is the useful info there?
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5402016-04-13T23:57:25 <sipa> cfields_: i doubt it is important to keep its exact semantics
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5422016-04-13T23:59:43 <cfields_> ok