blckhm
Dabbler
- Joined
- Sep 24, 2018
- Messages
- 42
Hi everyone,
we're using freenas for serving static content such as jpg, gif etc. to our members on NFS share.
But we have weird operation behaviors on our disk drives.
unexpected write requests occurs on these drives.
"top -m io" shows us only READ ops. such as we expect
When we checked who's connected via nfs on storage with "netstat -an | grep {nfs_server_ip}.2049"
only 7 servers established such as we expect.
Finally, we checked nfs client stats on these 7 servers with "nfsstat -c", everything looks fine, a few (1-2) write operation occurred in 10 seconds.
But disk ops. charts shows us weird write operations on all of these disk drives.
Here is the one;
View attachment 30616
We could not find any reasonable meaning for these write operations. Is there something we missed?
How can we examine further ?
Kind Regards
we're using freenas for serving static content such as jpg, gif etc. to our members on NFS share.
But we have weird operation behaviors on our disk drives.
unexpected write requests occurs on these drives.
"top -m io" shows us only READ ops. such as we expect
Code:
last pid: 74082; load averages: 0.23, 0.28, 0.29 up 28+15:17:25 17:08:49 64 processes: 1 running, 63 sleeping CPU: 0.1% user, 0.0% nice, 1.5% system, 0.2% interrupt, 98.2% idle Mem: 17M Active, 814M Inact, 478M Laundry, 112G Wired, 3753M Free ARC: 88G Total, 69G MFU, 11G MRU, 4619K Anon, 1858M Header, 6194M Other 62G Compressed, 81G Uncompressed, 1.30:1 Ratio Swap: 10G Total, 10G Free PID USERNAME VCSW IVCSW READ WRITE FAULT TOTAL PERCENT COMMAND 2410 root 570 1 124 8 0 132 100.00% nfsd 98821 root 774 2 0 0 0 0 0.00% collectd 2922 root 262 1 0 0 0 0 0.00% rrdcached 2614 root 3 0 0 0 0 0 0.00% python3.6 1762 root 17 0 0 0 0 0 0.00% vmtoolsd 252 root 17 1 0 0 0 0 0.00% python3.6 74059 root 3 0 0 0 0 0 0.00% top 2610 root 2 2 0 0 0 0 0.00% snmpd 2768 root 2 0 0 0 0 0 0.00% dtrace 2766 root 3 0 0 0 0 0 0.00% dtrace 99304 root 4 0 0 0 0 0 0.00% python3.6 2767 root 1 0 0 0 0 0 0.00% dtrace 57073 www 5 0 0 0 0 0 0.00% nginx 2675 root 2 0 0 0 0 0 0.00% ntpd
When we checked who's connected via nfs on storage with "netstat -an | grep {nfs_server_ip}.2049"
only 7 servers established such as we expect.
Code:
Proto Recv-Q Send-Q Local Address Foreign Address (state) tcp4 0 124 nfs_server_ip.2049 nfs_client_ip1.731 ESTABLISHED tcp4 0 0 nfs_server_ip.2049 nfs_client_ip2.787 ESTABLISHED tcp4 0 0 nfs_server_ip.2049 nfs_client_ip3.640 ESTABLISHED tcp4 0 0 nfs_server_ip.2049 nfs_client_ip4.813 ESTABLISHED tcp4 0 0 nfs_server_ip.2049 nfs_client_ip5.804 ESTABLISHED tcp4 0 0 nfs_server_ip.2049 nfs_client_ip6.792 ESTABLISHED tcp4 0 0 nfs_server_ip.2049 nfs_client_ip7.863 ESTABLISHED
Finally, we checked nfs client stats on these 7 servers with "nfsstat -c", everything looks fine, a few (1-2) write operation occurred in 10 seconds.
But disk ops. charts shows us weird write operations on all of these disk drives.
Here is the one;
View attachment 30616
We could not find any reasonable meaning for these write operations. Is there something we missed?
How can we examine further ?
Kind Regards