Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Wed, 04 Apr 2012 14:12:02 +0200 Pascal BERTON <pascal.berton3 at free.fr> wrote: > Dirk, > > Isn't there an error in your numbers ? > You say that with you non-custered system you transfer 500GB in 400 > seconds, which means more than a GB per second, and I can't figure out > how you can achieve that with 100Mb link that can't run faster than > roughly 10MB/s. Or did I miss something ? > > Regards, > > Pascal. > > Pascal, for your information, rsync doesn't transfer everything each time as it uses a delta-transfer algorithm to reduce the amount of data transfered! > Le 04/04/2012 12:15, Dirk Bonenkamp - ProActive a écrit : > > Hi, > > > > First off all: I posted a similar thread on the OCFS2 mailing list, but > > I didn't receive a lot of response. This list seems to be busier, maybe > > more luck over here... > > > > I'm having trouble backing up a OCFS2 file system. I'm using rsync and I > > find this way, way slower than rsyncing a 'traditional' file system. > > > > The OCFS2 filesytem lives on a double primary DRBD setup. DRBD runs on > > hardware RAID6, dedicated bonded gigabyte NICs, I get a 160 Mb/s syncer > > speed. Read and write speeds are OK on the file system. > > > > Some figures: > > > > My OCFS2 filesystem is 3.7 Tb in size, 200 Gb is used, has about 1.5 > > million files on it in 95 directories. About 3000 new files are added > > each day, few files are changed. > > > > Rsyncing (directlty to the rsync daemon, no ssh shell overhead) this > > filesystem over a Gb connection takes 70 minutes: > > > > Number of files: 1495981 > > Number of files transferred: 2944 > > Total file size: 201701039047 bytes > > Total transferred file size: 613318155<tel:613318155> bytes > > Literal data: 613292255<tel:613292255> bytes > > Matched data: 25900 bytes > > File list size: 24705311 > > File list generation time: 0.001 seconds > > File list transfer time: 0.000 seconds > > Total bytes sent: 118692 > > Total bytes received: 638195567<tel:638195567> > > > > sent 118692 bytes received 638195567<tel:638195567> bytes 154163.57 > > bytes/sec > > total size is 201701039047 speedup is 315.99 > > > > To compare this, I have a similar system (the old, non-HA system doing > > the exact same thing), with an ext3 filesystem. This one holds 6.5 > > million files, 500 Gb, about 10.000 new files a day. Backup done with > > rsync through ssh on a 100 Mbit line takes 400 seconds. > > > > I'd like to know if somebody has encountered similar problems and maybe > > has some tips / insights for me? > > > > Kind regards, > > > > Dirk > > > > > > > > > > _______________________________________________ > > drbd-user mailing list > > drbd-user at lists.linbit.com > > http://lists.linbit.com/mailman/listinfo/drbd-user > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user >