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* tier/libgfdb: Ordering query results from libgfdbJoseph Fernandes2016-04-261-5/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When querying we will order the query result to get the hotest or the coldest files in the queried list so that these files are migrated first. Now here we are giving priority to the write heat(time and counters), as it requires complex queries to have a composite ordering of write and read + it has it impact on performance. Backport of http://review.gluster.org/13607 > Change-Id: I2e0415dcfad4218b42c68fc5c2ed8d1f075ce9ea > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Reviewed-on: http://review.gluster.org/13607 > Smoke: Gluster Build System <jenkins@build.gluster.com> > Tested-by: Joseph Fernandes > NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> > CentOS-regression: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Dan Lambright <dlambrig@redhat.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Change-Id: If5fad07f8d0f50016b10e256803abd5266cd708f BUG: 1323017 Reviewed-on: http://review.gluster.org/13881 Smoke: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Joseph Fernandes Tested-by: Joseph Fernandes NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com>
* all: reduce "inline" usageKaleb S KEITHLEY2016-01-181-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | There are three kinds of inline functions: plain inline, extern inline, and static inline. All three have been removed from .c files, except those in "contrib" which aren't our problem. Inlines in .h files, which are overwhelmingly "static inline" already, have generally been left alone. Over time we should be able to "lower" these into .c files, but that has to be done in a case-by-case fashion requiring more manual effort. This part was easy to do automatically without (as far as I can tell) any ill effect. In the process, several pieces of dead code were flagged by the compiler, and were removed. backport of Change-Id: I56a5e614735c9e0a6ee420dab949eac22e25c155, http://review.gluster.org/11769, BUG: 1245331 Change-Id: Iba1efb0bc578ea4a5e9bf76b7bd93dc1be9eba44 BUG: 1283302 Signed-off-by: Kaleb S KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/12646 Smoke: Gluster Build System <jenkins@build.gluster.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* ctr/sql: Providing for vol set for sqlcachesize and sqlWALsize and skip ↵Joseph Fernandes2015-12-221-13/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | recording path 1. Providing vol set option for cache size and wal autocheck point so that performance can be tuned. 2. Removed recording of file path in the db. Trimming database columns. Path need not be stored in the db, as PARGFID, GFID, Basename is suffice to derive the path during migration. Backport of http://review.gluster.org/12972 > Change-Id: I2cb590451a6d244bc91fe66c6dbffe2c2059dfb8 > BUG: 1293034 > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Reviewed-on: http://review.gluster.org/12972 > Reviewed-by: N Balachandran <nbalacha@redhat.com> > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Tested-by: NetBSD Build System <jenkins@build.gluster.org> > Reviewed-by: Dan Lambright <dlambrig@redhat.com> > Tested-by: Dan Lambright <dlambrig@redhat.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Change-Id: Ia1c109983ec6ce75ed27b8c08f454f5b6283c31d BUG: 1293659 Reviewed-on: http://review.gluster.org/13067 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/libgfdb/sql: Correcting logic in sql query for readJoseph Fernandes2015-12-041-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Correcting query in the where clause from "a & b | c" to "a & (b | c)" where "a" is the condition to join the gf_file_tb and gf_flink_tb through gfids "b" is the condition for the write heat and "c" is the condition for read heat Backport of http://review.gluster.org/12823 > Change-Id: I99226d82b0efb68fbef3a40f02b215bb2b4370d6 > BUG: 1286656 > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Signed-off-by: Dan Lambright <dlambrig@redhat.com> > Reviewed-on: http://review.gluster.org/12823 > Tested-by: NetBSD Build System <jenkins@build.gluster.org> > Tested-by: Gluster Build System <jenkins@build.gluster.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Change-Id: I70533c8589a6cd67e8737e110af0a23abed9013d BUG: 1287583 Reviewed-on: http://review.gluster.org/12868 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/libgfdb: Extending log level flexibity in libgfdbJoseph Fernandes2015-11-111-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | Extending log level flexibity to relevant fops and operations This is an extension to http://review.gluster.org/#/c/12491/ Backport of http://review.gluster.org/#/c/12567/ > Change-Id: I33b2f7732f89f52569fb99baa692c7e3bb4c7ab1 > BUG: 1277352 > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Reviewed-on: http://review.gluster.org/12567 > Tested-by: NetBSD Build System <jenkins@build.gluster.org> > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Dan Lambright <dlambrig@redhat.com> > Tested-by: Dan Lambright <dlambrig@redhat.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Change-Id: Idcde04a65775ce98367967faf8a53b0f07ff022e BUG: 1279059 Reviewed-on: http://review.gluster.org/12569 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/libgfdb: Replacing ASCII query file with binaryJoseph Fernandes2015-11-081-56/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earlier, when the database was queried we used to save all the queried records in an ASCII format in the query file. This caused issues like filename having ASCII delimiter and used to take a lot of space. The tier.c file also had a lot of parsing code. Here we changed the format of the query file to binary. All the logic of serialization and formating of query record is done by libgfdb. Libgfdb provides API, gfdb_write_query_record() and gfdb_read_query_record(), which the user i.e tier migrator and CTR xlator can use to write to and read from query file. With this binary format we save on disk space i.e reduce to 50% atleast as we are saving GFID's in binary format 16 bytes and not the string format which takes 36 bytes + We are not saving path of the file + we are also saving on ASCII delimiters. The on disk format of query record is as follows, +---------------------------------------------------------------------------+ | Length of serialized query record | Serialized Query Record | +---------------------------------------------------------------------------+ 4 bytes Length of serialized query record | | -------------------------------------------------| | | V Serialized Query Record Format: +---------------------------------------------------------------------------+ | GFID | Link count | <LINK INFO> |..... | FOOTER | +---------------------------------------------------------------------------+ 16 B 4 B Link Length 4 B | | | | -----------------------------| | | | | | V | Each <Link Info> will be serialized as | +-----------------------------------------------+ | | PGID | BASE_NAME_LENGTH | BASE_NAME | | +-----------------------------------------------+ | 16 B 4 B BASE_NAME_LENGTH | | | ------------------------------------------------------------------------| | | V FOOTER is a magic number 0xBAADF00D indicating the end of the record. This also serves as a serialized schema validator. Backport of http://review.gluster.org/#/c/12354/ > Change-Id: I9db7416fd421e118dd44eafab8b535caafe50d5a > BUG: 1272207 > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Reviewed-on: http://review.gluster.org/12354 > Reviewed-by: N Balachandran <nbalacha@redhat.com> > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Dan Lambright <dlambrig@redhat.com> > Tested-by: Dan Lambright <dlambrig@redhat.com> Change-Id: I170c579027f2594a58706f826e3ddf89e34022f4 BUG: 1263619 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/12535 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/ctr: Ignore CTR Lookup heal insert errorsJoseph Fernandes2015-11-071-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | CTR doesnt read from the DB, so to make sure that file records are created it does a heal during a lookup. It remembers the decision in the inode context cache and retrys periodically. When the volume is restarted it looses all the inode cache from the previous time and CTR lookup heals tries the heal again, but this time it finds that the records are already there from sql and logs this error, and remembers this until the volume is restarted or inode is flushed out of inode cache of the brick. Solution: the log levels should be reduced to trace for this case and customers need not see this. Backport of http://review.gluster.org/#/c/12491/ Change-Id: I5f11e83c306ae912a90f12220f62bb7563b8eb96 BUG: 1279059 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/12534 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/ctr: Solution for db locks for tier migrator and ctr using sqlite ↵Joseph Fernandes2015-10-091-70/+191
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | version less than 3.7 i.e rhel 6.7 Problem: On RHEL 6.7, we have sqlite version 3.6.2 which doesnt support WAL journaling mode, as this journaling mode is only available in sqlite 3.7 and above. As a result we cannot have to progreses concurrently accessing sqlite, without running into db locks! Well WAL is also need for performace on CTR side. Solution: This solution is to use CTR db connection for doing queries when WAL mode is absent. i,e tier migrator will send sync_op ipc calls to CTR, which in turn will do the query and create/update the query file suggested by tier migrator. Pending: Well this solution will stop the db locks but the performance is still an issue for CTR. We are developing an in-Memory Transaction Log (iMeTaL) which will help boost the CTR performance by doing in memory udpates on the IO path and later flush the updates to the db in a batch/segment flush. Master patch: http://review.gluster.org/#/c/12191 >> Change-Id: Ie3149643ded159234b5cc6aa6cf93b9022c2f124 >> BUG: 1240577 >> Signed-off-by: Joseph Fernandes <josferna@redhat.com> >> Signed-off-by: Dan Lambright <dlambrig@redhat.com> >> Signed-off-by: Joseph Fernandes <josferna@redhat.com> >> Reviewed-on: http://review.gluster.org/12191 >> Tested-by: Gluster Build System <jenkins@build.gluster.com> >> Reviewed-by: Luis Pabon <lpabon@redhat.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Change-Id: Ie8c7a7e9566244c104531b579126bb57fbc6e32b BUG: 1270123 Reviewed-on: http://review.gluster.org/12325 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/ctr: Solving DB Lock issue due to write contention from db connectionsJoseph Fernandes2015-09-111-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a backport of 12031. > Problem: The DB on the brick is been accessed by CTR, for write and > tier migrator, for read and write. The write from tier migrator is reseting > the heat counters after a cycle. Since we are using sqlite, two connections > trying to write would cause a db lock contention. As a result CTR used to fail > to update the db. > Solution: Using the same db connection of CTR for reseting the heat counters. > 1) Introducted a new IPC FOP for CTR > 2) After the query do a ipc syncop to the underlying client xlator associated > to the brick. > 3) CTR in brick will catch the IPC FOP and cleat the heat counters. > Change-Id: I53306bfc08dcdba479deb4ccc154896521336150 > BUG: 1260730 > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Reviewed-on: http://review.gluster.org/12031 > Tested-by: NetBSD Build System <jenkins@build.gluster.org> > Tested-by: Gluster Build System <jenkins@build.gluster.com> Signed-off-by: Dan Lambright <dlambrig@redhat.com> Conflicts: xlators/cluster/dht/src/tier.c Change-Id: I88aa289cdf21e216b42c3d8ccfb4e7e828b43772 BUG: 1262341 Reviewed-on: http://review.gluster.org/12161 Reviewed-by: Joseph Fernandes Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* cluster/tier: add gluster v tier <vol>Dan Lambright2015-09-101-13/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a backport of 11984. > Currently the tier feature piggy backs off the rebalance command > syntax to obtain status and this is clumsy. Introduce a new > tier command that can do tier specific operations, starting > with volume status to display counters. > Old commands: > gluster volume attach-tier <vol> [replica count] {bricklist..} > gluster volume detach-tier <vol> {start|stop|commit} > New commands: > gluster volume tier <vol> attach [replica count] {bricklist} | > detach {start|stop|commit} | > status > Change-Id: Ic07b3c6260588162de7d34380f8cbd3d8a7f35d3 > BUG: 1255693 > Signed-off-by: Dan Lambright <dlambrig@redhat.com> > Reviewed-on: http://review.gluster.org/11984 > Reviewed-by: Gaurav Kumar Garg <ggarg@redhat.com> > Tested-by: Gluster Build System <jenkins@build.gluster.com> Signed-off-by: Dan Lambright <dlambrig@redhat.com> Change-Id: Id45bd0fa6b8606dd47863de83a694908da393229 BUG: 1261664 Signed-off-by: Dan Lambright <dlambrig@redhat.com> Reviewed-on: http://review.gluster.org/12143 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Gaurav Kumar Garg <ggarg@redhat.com>
* cluster/tier: fix 64 bit issue with sql query using timesDan Lambright2015-08-131-4/+4
| | | | | | | | | | | | | | | | | | This is a backport of 11885. > We overflowed when converting seconds to usecs in preperation for > sql queries. The fix uses uint64_t throughout including subexpressions. > Change-Id: I59bdb742197400dede97f54735b52030920b0d19 > BUG: 1231268 > Signed-off-by: Dan Lambright <dlambrig@redhat.com> Change-Id: Iaef7083dac7a162080f4bc23e29dedfe700fa342 BUG: 1252903 Signed-off-by: Dan Lambright <dlambrig@redhat.com> Reviewed-on: http://review.gluster.org/11913 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Joseph Fernandes
* libgfdb/sql: Fixing broken query of find_unchangedJoseph Fernandes2015-07-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | The find_unchanged query should be "write_heat <= defined_heat" AND "read_heat <= defined_heat" and not "write_heat <= defined_heat" OR "read_heat <= defined_heat" >>Backport of http://review.gluster.org/#/c/11577/ >>Change-Id: Ie82e02aafbb7ea14563007307de3350ea022049a >>BUG: 1240970 >>Signed-off-by: Joseph Fernandes <josferna@redhat.com> Change-Id: Ie5d06fa2e3a3552741d2e6bd76807a69808c3d65 BUG: 1241776 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/11608 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Reviewed-by: Pamela Ousley <pousley@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/ctr: Ignore creation of T file and Ctr Lookup heal improvememntsDan Lambright2015-06-271-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a back port of 11334 1) Ignore creation of T file in ctr_mknod 2) Ignore lookup for T file in ctr_lookup 3) Ctr_lookup: a. If the gfid and pgfid in empty dont record b. Decreased log level for multiple heal attempts c. Inode/File heal happens after an expiry period, which is configurable. d. Hardlink heal happens after an expiry period, which is configurable. > Change-Id: Id8eb5092e78beaec22d05f5283645081619e2452 > BUG: 1235269 > Signed-off-by: Joseph Fernandes <josferna@redhat.com> > Reviewed-on: http://review.gluster.org/11334 > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Dan Lambright <dlambrig@redhat.com> > Tested-by: Dan Lambright <dlambrig@redhat.com> Change-Id: Ia28a5cf975e41d318906f707deca447aaa35630f BUG: 1236288 Signed-off-by: Dan Lambright <dlambrig@redhat.com> Reviewed-on: http://review.gluster.org/11446 Reviewed-by: Joseph Fernandes Tested-by: Joseph Fernandes Tested-by: Gluster Build System <jenkins@build.gluster.com>
* gfdb/libglusterfs : Port log messages to a new frameworkMohamed Ashiq2015-06-261-87/+106
| | | | | | | | | | | | | | | | | | | | | | Backport of http://review.gluster.org/#/c/10819/ Cherry picked from 2847b03a38515a625e36d52c7e0a1d37107d72ba >Change-Id: I61874561fdf2c175d2b3eec0c85c25f12dc60552 >BUG: 1194640 >Signed-off-by: Mohamed Ashiq <ashiq333@gmail.com> >Reviewed-on: http://review.gluster.org/10819 >Tested-by: NetBSD Build System <jenkins@build.gluster.org> >Tested-by: Gluster Build System <jenkins@build.gluster.com> >Reviewed-by: Joseph Fernandes Change-Id: I61874561fdf2c175d2b3eec0c85c25f12dc60552 BUG: 1217722 Signed-off-by: Mohamed Ashiq <ashiq333@gmail.com> Reviewed-on: http://review.gluster.org/11284 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
* tier/tier.t: Fixing tier.t crash in regression runsJoseph Fernandes2015-05-301-6/+5
| | | | | | | | | | | | | | | | | | | | | | | 1) If the database file exists a. Dont try re-creating the db schema b. Dont try re-configuring the db. 2) Dont assert in fini_db () when connection is NULL >> Signed-off-by: Joseph Fernandes <josferna@redhat.com> >> Reviewed-on: http://review.gluster.org/10870 >> Tested-by: NetBSD Build System >> Tested-by: Gluster Build System <jenkins@build.gluster.com> >> Reviewed-by: Vijay Bellur <vbellur@redhat.com> >> Signed-off-by: Joseph Fernandes <josferna@redhat.com> >>Change-Id: Idd2833f55caaa6b3a77d935d877d6c4d2994da6a Change-Id: Ia2e044fce4e41bccc8fdada1cb21f240fdbd55df BUG: 1225077 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/10992 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
* ctr : Fix for heating of files during promotion/demotionJoseph Fernandes2015-04-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fix will solve the heating of the files during the promotion or demotion. Promotion: ~~~~~~~~~ When a file gets promoted it get the current time stamp during creation only, but following writes or reads during the migration wont heat the file. Demotion: ~~~~~~~~ When a file gets demoted it get the wind/unwind time stamp is set to zero. The following writes or reads during the migration wont heat the file. What is remaining ? ~~~~~~~~~~~~~~~~~ Bug 1209129 ( https://bugzilla.redhat.com/show_bug.cgi?id=1209129 ) Inspite of this fix there is still a issue remaining, i.e the heat of the file is not keep intact during a internal rebalance activity i.e a rebalance within a tier. Change-Id: I01e82dc226355599732d40e699062cee7960b0a5 BUG: 1207867 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Signed-off-by: Dan Lambright <dlambrig@redhat.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/10080 Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* libgfdb: fix possible illegal memory access (CID 1288820)Michael Adam2015-04-021-1/+2
| | | | | | | | | | | | | | | | | | Coverity CID 1288820 strncpy executed with a limit equal to the target array size potentially leaves the target string not null terminated. Make sure the copied string is a valid 0 terminated string. Change-Id: I39ff6a64ca5b9e30562226dd34c5b06267b75b87 BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10063 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Poornima G <pgurusid@redhat.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Joseph Fernandes <josferna@redhat.com> Tested-by: Joseph Fernandes <josferna@redhat.com>
* Gfdb Query Fix and Volume option fixJoseph Fernandes2015-03-301-2/+2
| | | | | | | | | | | | | | 1) Query fix in find_changed_with_freq() 2) Volume option typo fix for write_freq_threshold and read_freq_threshold Change-Id: I38e154818178aab412b2d7b2914cd29acef66ffb BUG: 1207343 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/10050 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* Adding Libgfdb to GlusterFSJoseph Fernandes2015-03-181-0/+1101
************************************************************************* Libgfdb | ************************************************************************* Libgfdb provides abstract mechanism to record extra/rich metadata required for data maintenance, such as data tiering/classification. It provides consumer with API for recording and querying, keeping the consumer abstracted from the data store used beneath for storing data. It works in a plug-and-play model, where data stores can be plugged-in. Presently we have plugin for Sqlite3. In the future will provide recording and querying performance optimizer. In the current implementation the schema of metadata is fixed. Schema: ~~~~~~ GF_FILE_TB Table: ~~~~~~~~~~~~~~~~~ This table has one entry per file inode. It holds the metadata required to make decisions in data maintenance. GF_ID (Primary key) : File GFID (Universal Unique IDentifier in the namespace) W_SEC, W_MSEC : Write wind time in sec & micro-sec UW_SEC, UW_MSEC : Write un-wind time in sec & micro-sec W_READ_SEC, W_READ_MSEC : Read wind time in sec & micro-sec UW_READ_SEC, UW_READ_MSEC : Read un-wind time in sec & micro-sec WRITE_FREQ_CNTR INTEGER : Write Frequency Counter READ_FREQ_CNTR INTEGER : Read Frequency Counter GF_FLINK_TABLE: ~~~~~~~~~~~~~~ This table has all the hardlinks to a file inode. GF_ID : File GFID (Composite Primary Key)``| GF_PID : Parent Directory GFID (Composite Primary Key) |-> Primary Key FNAME : File Base Name (Composite Primary Key)__| FPATH : File Full Path (Its redundant for now, this will go) W_DEL_FLAG : This Flag is used for crash consistancy, when a link is unlinked. i.e Set to 1 during unlink wind and during unwind this record is deleted LINK_UPDATE : This Flag is used when a link is changed i.e rename. Set to 1 when rename wind and set to 0 in rename unwind Libgfdb API: ~~~~~~~~~~~ Refer libglusterfs/src/gfdb/gfdb_data_store.h Change-Id: I2e9fbab3878ce630a7f41221ef61017dc43db11f BUG: 1194753 Signed-off-by: Joseph Fernandes <josferna@redhat.com> Signed-off-by: Dan Lambright <dlambrig@redhat.com> Signed-off-by: Joseph Fernandes <josferna@redhat.com> Reviewed-on: http://review.gluster.org/9683 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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