Wez Furlong 78ef6207e3 use rocksdb column families to separate key spaces ... Summary: We're running down a performance problem with hg status that we believe is something happening at a higher level in the code but noticed that there were a lot of reads of the rocksdb SST files. In the strace output for those we observed file content data being read. The status operation shouldn't need file contents; what's happening is that we're over-fetching some metadata but happen to be scooping up the file contents from the SST file because we use the same key prefixes and differentiate the keyspace with key suffixes. This diff implements the use of rocksdb column families to partition things more effectively and results in a speed up of around 6x in this scenario. Furthermore, applying point lookup optimization options yields an additional 2x performance improvement to our rocksdb performance. As part of this diff, I've removed the hash set that we were using to allow checking whether a key was present in the store; it wasn't very useful and would have had to be split into one set per keyspace with this diff; easier to just remove it. Reviewed By: bolinfest Differential Revision: D5781906 fbshipit-source-id: 97f068ade546fd09f391e60a7a57fec0e9081e67		2017-09-07 14:50:42 -07:00
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git	Remove no-longer-needed @manual for rocksdb	2017-09-01 19:31:46 -07:00
hg	use rocksdb column families to separate key spaces	2017-09-07 14:50:42 -07:00
test	use rocksdb column families to separate key spaces	2017-09-07 14:50:42 -07:00
BackingStore.h	update all copyright statements to "2016-present"	2017-01-20 22:03:02 -08:00
BlobMetadata.h	update all copyright statements to "2016-present"	2017-01-20 22:03:02 -08:00
EmptyBackingStore.cpp	update all copyright statements to "2016-present"	2017-01-20 22:03:02 -08:00
EmptyBackingStore.h	apply clang-tidy modernize-use-override	2017-05-23 16:10:26 -07:00
IObjectStore.h	drop Future from the name of ObjectStore APIs	2017-06-21 17:20:50 -07:00
LocalStore.cpp	use rocksdb column families to separate key spaces	2017-09-07 14:50:42 -07:00
LocalStore.h	use rocksdb column families to separate key spaces	2017-09-07 14:50:42 -07:00
ObjectStore.cpp	update logging statements to use folly logging APIs	2017-06-22 13:50:13 -07:00
ObjectStore.h	drop Future from the name of ObjectStore APIs	2017-06-21 17:20:50 -07:00
StoreResult.cpp	update all copyright statements to "2016-present"	2017-01-20 22:03:02 -08:00
StoreResult.h	update all copyright statements to "2016-present"	2017-01-20 22:03:02 -08:00
TARGETS	allow specifying --config options to hg_import_helper.py	2017-08-02 17:07:19 -07:00