Hello everyone,
I was hoping someone could point me in the right direction here. I am getting slow writes on my Freenas host(new setup). Details are as follows:
Setup:
My findings:
When the a VM has a VMDK mapped onto the freenas host, I see the following results when copying files to it:
http://imgur.com/a/h5TLj
My memory seems to explode for some reason(I thought 32GB would be fine for 9TB of physical disk capacity?):
http://imgur.com/a/aEfdJ
Can someone point me in the right direction for ISCSI? My setup isn't crazily complicated. I'm hoping to get around 90mb/s consistently if possible. This host is only used for backups, but I'd still like to get something decent out of it. I've done quite a bit of reading and I thought I was on the right track in terms of hardware support(choosing a good ZIL and drives with TLER type technologies)
Any help would be greatly appreciated!
I was hoping someone could point me in the right direction here. I am getting slow writes on my Freenas host(new setup). Details are as follows:
- Supermicro A1SAi-2750F
- 32GB memory
- 1x Quad port NIC(E1G44HTBLK)
- 1x 120GB SSD (DC S3500 series)
- 3x WD red 3TB drives
- FreeNAS-11.0-RELEASE (a2dc21583)
Setup:
- The quad port nic has each port configured individually. Each port has a unique subnet which has been added into the portal tab in the ISCSI configuration
- Jumbo frames are not enabled(although it didn't make any difference when it was anyway)
- My ESXi host is running 6.0U2 with two dedicated gigabit ports mapped to two of the freenas ISCSI ports
- The SSD is used for the ZIL(after some reading I found that the S3500 seemed to be recommended by a lot of people due to it's random write and potential power loss capability)
- The WD drives are in a RaidZ. Although I've tried them in a stripe and I get the exact same results
- ESXi is in round robin for its iSCSI mappings
My findings:
When the a VM has a VMDK mapped onto the freenas host, I see the following results when copying files to it:
http://imgur.com/a/h5TLj
My memory seems to explode for some reason(I thought 32GB would be fine for 9TB of physical disk capacity?):
http://imgur.com/a/aEfdJ
dd if=/dev/zero of=/mnt/ISCSI-RaidZ-5TB/ddfile bs=1024k count=20k gives me: 1304235733 bytes/sec
Can someone point me in the right direction for ISCSI? My setup isn't crazily complicated. I'm hoping to get around 90mb/s consistently if possible. This host is only used for backups, but I'd still like to get something decent out of it. I've done quite a bit of reading and I thought I was on the right track in terms of hardware support(choosing a good ZIL and drives with TLER type technologies)
Any help would be greatly appreciated!
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