-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Also somewhat related, I have been looking for some time now to abstract out the UTXO and block databases so that a variety of key/value stores could be used as a backend, configured by a command line parameter. In particular, it would be interesting for some server applications to support HyperDex, which is basically a distributed, fault-tolerant version of LevelDB:
http://hyperdex.org/ By the same mechanism you could just as easily support a Sophia backend. Mark On 9/17/13 4:00 AM, Mike Hearn wrote: > LevelDB is fast - very fast if you give it enough CPU time and > disk seeks. But it's not the last word in performance. > > HyperLevelDB is a forked LevelDB with some changes, mostly, finer > grained locking and changes to how compaction works: > > http://hyperdex.org/performance/leveldb/ > > However, it comes with a caveat - one of the changes they made is > to take away write throttling if compaction falls behind, the app > itself is expected to do that. > > Sophia is a competitor to LevelDB. The website claims that in > benchmarks it completely smokes LevelDB. I have not explored how it > does this or tried to replicate their benchmarks myself: > > http://sphia.org/index.html http://sphia.org/benchmarks.html > > It's written in C and BSD licensed. > > As an example of the kind of speedup they claim to be capable of, > they say LevelDB could do 167,476 random reads per second on their > SSD based machine. Sophia could do 438,084 reads/sec. Random reads > are of course the most interesting for us because that's what UTXO > lookups involve. > > They also compare against HyperLevelDB, where the differences are > much less pronounced and actually HyperLevelDB appears to be able > to do random writes faster than Sophia. > > > > > ------------------------------------------------------------------------------ > > LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! > 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, > SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New > Multi-Library Power Pack includes Mobile, Cloud, Java, and UX > Design. Lowest price ever! Ends 9/20/13. > http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk > > > > > _______________________________________________ Bitcoin-development > mailing list Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.19 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJSOIymAAoJEAdzVfsmodw4H48QALC+ae4wRLEg3lrg9sgayfOn ukLM079PXgEbARFPt6WxkLnNGYzEbb7IzT0uvaKH4VIW/rrORy9VqNPmliF+834h XygUwfAzU04K/oLyCsdWZcOugj2P8aufNeA6whLS5IijDLtHb3Ueu4ORNcfLBGqp KKfqPj0QHseusiLJ9f3IW+LrdM1vAoT1jryTngpQy2i+qFFDM6CN3THCq4adJvjr AnYlfLoJSZ0/obz/krwLv6vP1BbwxXzv5CfD0Q2bdoEV/EgWDP3Bd5tUzUCjj53/ qMmhaACoVlarohh64s3JNSDSkHDFSbHFt65ZgNQbNY1wmSeyilQcd8FGWOF/WRzW Z/pl2IdhoCm3t86xSggRGivj/EVeBJlD36i7ohpDbVWFPsf6B4e5M6xSdso/2WBp fr55TwehCaGE+UHa0gITkE/si1txvY4gti0bLNvwFDEcZ3qsXRsz4CyLlZLMBbPX 4aRNGyqv2yJ2AivkEyNOUugo1Q8RKEKZWfWWDecI53DHdebzKX1zu9GLJwlGJqGw Qzm7Tdb7S8J/D6IIHf4Xq2LDhQ2fnPylmGSmtuVFEMxeDhmdbNqKSr3kqlWQf3T8 Oa8bm6kUQFJ+11jLEkVEGZJC4e42+faQBxR+CsqvVsTEezDCP1dE7D3QV8ry9YBc DwXt3299Q03B5LoxpWTq =KseH -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
