Hi Everyone,
We have a system built around several IBM N-Series N3220 (FAS2240-2) filers.
When I run snapvault of our biggest cifs share it is running 9-10hours.
The users are running a pgm that is deleting lots documents out of this share.
A week ago the share had +32m inodes. Today it has 23m inodes.
Just yesterday they deleted 1m inodes.
During the entire SV run the disks on the prod filer head are
Running at 96-100% utilization.
This is clearly hammering the disks and they are a big bottleneck.
During normal activity on this share usually runs SV in a few min to an hour.
My question: Does this sound reasonable?
Does a 9-10hr SV run pounding disks at >96% util
for a high delete rate in the share?
Thanks
Rick
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= detail info
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All heads are running Data ONTAP Release 8.1.2P1 7-Mode.
The main Prod filer is a dual head (HA) with one head dedicated to FCP/luns,
while the other head is dedicated to CIFS shares.
Prod-Head-A 16x3tb drives, raidDP All CIFS shares
Prod-Head-B 22x600gb drives, raidDP Oracle DB FCP/Luns
The SV secondary is a single head that is dedicated as a Snapvault secondary.
SV-Head-A 18x3tb drives, raidDP SV Secondary for both Prod heads above
Df and df -i for the share in question. A week ago it had 32m inodes.
df
Filesystem kbytes used avail capacity Mounted on
/vol/v_fnce22p_cifs/ 3208544256 3143864380 64679876 98% /vol/v_fnce22p_cifs/
/vol/v_fnce22p_cifs/.snapshot 0 264078944 0 ---% /vol/v_fnce22p_cifs/.snapshot
Df -i
Filesystem iused ifree %iused Mounted on
/vol/v_fnce22p_cifs/ 23009838 19147066 55% /vol/v_fnce22p_cifs/
The application folks are running pgms that are deleting documents out of this share.
The result of this activity is that snapvault runs on this share is taking 9-10hr.
The transfer duration is 7hr, but the entire cmd ran over 9hr.
Here is the snapvault status from a backup run.
The SV had a transfer duration of 7hr, but the actual cmd took over 9hr to run.
==> cmd = ssh -q xxxxxxxxa -n snapvault status -l /vol/v_fnce22p_cifs/q_fnce22p_cifs
Snapvault is ON.
Source: yyyyyyyya:/vol/v_fnce22p_cifs/q_fnce22p_cifs
Destination: xxxxxxxxa:/vol/v_fnce22p_cifs/q_fnce22p_cifs
Status: Idle
Progress: -
State: Snapvaulted
Lag: 10:40:15
Mirror Timestamp: Tue Aug 5 06:42:03 EDT 2014
Base Snapshot: xxxxxxxxa(1896301030)_v_fnce22p_cifs-base.0
Current Transfer Type: -
Current Transfer Error: -
Contents: Replica
Last Transfer Type: Update
Last Transfer Size: 542620 KB
Last Transfer Duration: 07:11:58
Last Transfer From: yyyyyyyya:/vol/v_fnce22p_cifs/q_fnce22p_cifs
During this SV run, the disks on the prod head are >95% busy for the duration of the cmd.
Here are a few sysstat lines from during the SV run.
CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk OTHER FCP iSCSI FCP kB/s iSCSI kB/s
in out read write read write age hit time ty util in out in out
23% 0 1113 0 1131 482 1600 25612 1674 0 0 1 90% 64% Ts 98% 8 10 0 0 1 0 0
24% 0 1167 0 1185 1052 4197 16627 2151 0 0 58s 92% 61% 12s 100% 8 10 0 0 1 0 0
28% 0 1177 0 1197 1012 2645 28593 2186 0 0 53s 90% 70% Ts 96% 10 10 0 0 1 0 0
28% 0 1109 0 1127 890 1478 33394 2336 0 0 5s 90% 89% 14 97% 8 10 0 0 1 0 0
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