On 01/24/17 10:22 AM, Eneko Lacunza wrote: > Hi Miguel, > > El 24/01/17 a las 10:11, Miguel González escribió: >> Reads and in both, Proxmox and therefore in guest VMs. >> >> As you can see in my messages writes seem to be more or less fine around >> 140 MB/s in Proxmox while reads are around 40 MB/s. >> >> At this point I don´t know if there is something related to hardware or >> software, I have raised a ticket with support. > > Ok, I don't think pveperf's "fsyncs/second" is good, it's way too low. > > Also, 42MB/s isn't very good from VM, but maybe qcow2 is expanding the > file there. > > Re-reading your first post I think you have a hw/cabling issue. Does sdb > give same hdparm results as sda?
Ok, suggested by support I took down all VMs and run the tests without nothing running. I still find fsyncs low from time to time, which I don´t understand, varying from 2-40 is a bit too much variation from my point of view. root@myserver:~# pveperf /vz/ CPU BOGOMIPS: 42667.60 REGEX/SECOND: 1099581 HD SIZE: 1809.50 GB (/dev/mapper/pve-data) BUFFERED READS: 138.73 MB/sec AVERAGE SEEK TIME: 18.94 ms FSYNCS/SECOND: 1.97 DNS EXT: 17.82 ms DNS INT: 13.27 ms (myserver) root@myserver:~# pveperf /vz/ CPU BOGOMIPS: 42667.60 REGEX/SECOND: 1162253 HD SIZE: 1809.50 GB (/dev/mapper/pve-data) BUFFERED READS: 123.24 MB/sec AVERAGE SEEK TIME: 13.28 ms FSYNCS/SECOND: 39.64 DNS EXT: 11.67 ms DNS INT: 19.81 ms (myserver) root@myserver:~# pveperf /vz/ CPU BOGOMIPS: 42667.60 REGEX/SECOND: 1123387 HD SIZE: 1809.50 GB (/dev/mapper/pve-data) BUFFERED READS: 121.61 MB/sec AVERAGE SEEK TIME: 13.83 ms FSYNCS/SECOND: 22.67 DNS EXT: 14.01 ms DNS INT: 13.90 ms (myserver) root@myserver:~# pveperf /vz/ CPU BOGOMIPS: 42667.60 REGEX/SECOND: 1138502 HD SIZE: 1809.50 GB (/dev/mapper/pve-data) BUFFERED READS: 100.28 MB/sec AVERAGE SEEK TIME: 13.74 ms FSYNCS/SECOND: 41.03 DNS EXT: 13.72 ms DNS INT: 12.70 ms (myserver) root@myserver:~# pveperf /vz/ CPU BOGOMIPS: 42667.60 REGEX/SECOND: 1102421 HD SIZE: 1809.50 GB (/dev/mapper/pve-data) BUFFERED READS: 134.41 MB/sec AVERAGE SEEK TIME: 12.74 ms FSYNCS/SECOND: 30.34 DNS EXT: 11.25 ms DNS INT: 14.16 ms (myserver) root@myserver:~# hdparm -tT /dev/sda /dev/sda: Timing cached reads: 16160 MB in 2.00 seconds = 8087.23 MB/sec Timing buffered disk reads: 434 MB in 3.00 seconds = 144.60 MB/sec root@myserver:~# hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 16492 MB in 2.00 seconds = 8253.77 MB/sec Timing buffered disk reads: 456 MB in 3.01 seconds = 151.44 MB/sec _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user