Toasters, I have an F760 running data ontap 6.3.1 with 4 FC-9 (7x32) shelves attached. I use Ultra 10 with a HP SureStore718 LVD autoloader for remote backups. I use rsh (rsh filer dump 0uf sunbox:/dev/rmt/1 /vol/vol1) via a cron job to run the dump. The Ultra10 and the filer are connected on a private network via 100TX crossover cable. Local file system backups (from the Ultra 10) to this tape drive go at about 4+ Meg/sec, great. The root volume of my filer and /vol3 dump at 4+ Megs/sec, this is great. However 2 volumes, vol1 and vol2, dump at 571Kb/sec. This performance is independent of the interface used, I get the same results using my 100TX or my gigabit. Likewise I get the same results when the dump is run from the filer, that is eliminating rsh. Sysstat looks normal during both dumps.
The only difference in the volumes is the number of files, volumes 1 and 2 each have about 2 million files where as volume 3 has 1.2 million files and the root is about 10,000 files with out quotas. The data on volumes 1 and 2 consists of lots of small files and changes frequently whereas volumes 0 and 3 are pretty static. I have already cut the volumes up into 4 qtrees of 30G each. A quota report does not look out of the ordinary and no single quota tree has more than 950,000 files, see quota report below.
What could be causing the dumps to progress so slowly? Any suggestions to speed up my backups?
K-Bytes Files Type ID Volume Tree Used Limit Used Limit Quota Specifier ----- -------- -------- -------- -------- -------- ------- ------- --------------- tree 1 vol4 zeus21 0 31457280 3 - /vol/vol4/zeus21 tree 2 vol4 zeus22 0 31457280 3 - /vol/vol4/zeus22 tree 3 vol4 zeus23 0 31457280 3 - /vol/vol4/zeus23 tree 4 vol4 zeus24 3969544 31457280 22085 - /vol/vol4/zeus24 tree 1 vol3 zeus17 3076 31457280 5 - /vol/vol3/zeus17 tree 2 vol3 zeus18 0 31457280 3 - /vol/vol3/zeus18 tree 3 vol3 tools_19 21525624 31457280 343289 - /vol/vol3/tools_19 tree 4 vol3 tools_20 22765236 31457280 701033 - /vol/vol3/tools_20 tree 1 vol2 zeus13 21631732 31457280 439528 - /vol/vol2/zeus13 tree 2 vol2 zeus14 30732636 31457280 716547 - /vol/vol2/zeus14 tree 3 vol2 zeus15 21069420 31457280 721908 - /vol/vol2/zeus15 tree 4 vol2 zeus16 0 31457280 3 - /vol/vol2/zeus16 tree 2 vol1 zeus11 26029280 31457280 933922 - /vol/vol1/zeus11 tree 3 vol1 zeus12 29793368 31457280 788538 - /vol/vol1/zeus12
Thanks, Jamie
-Jamie.