Hi all, although I'm running all this in a Sol10u5 X4500, I hope I may ask this question here. If not, please let me know where to head to.
We are running several X4500 with only 3 raidz2 zpools since we want quite a bit of storage space[*], but the performance we get when using zfs send is sometimes really lousy. Of course this depends what's in the file system, but when doing a few backups today I have seen the following: receiving full stream of atlashome/[EMAIL PROTECTED] into atlashome/BACKUP/[EMAIL PROTECTED] in @ 11.1 MB/s, out @ 11.1 MB/s, 14.9 GB total, buffer 0% full summary: 14.9 GByte in 45 min 42.8 sec - average of 5708 kB/s So, a mere 15 GB were transferred in 45 minutes, another user's home which is quite large (7TB) took more than 42 hours to be transferred. Since all this is going a 10 Gb/s network and the CPUs are all idle I would really like to know why * zfs send is so slow and * how can I improve the speed? Thanks a lot for any hint Cheers Carsten [*] we have some quite a few tests with more zpools but were not able to improve the speeds substantially. For this particular bad file system I still need to histogram the file sizes. -- Dr. Carsten Aulbert - Max Planck Institute for Gravitational Physics Callinstrasse 38, 30167 Hannover, Germany Phone/Fax: +49 511 762-17185 / -17193 http://www.top500.org/system/9234 | http://www.top500.org/connfam/6/list/31 _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
