NorCalTechSupport
Explorer
- Joined
- Aug 25, 2014
- Messages
- 89
4U chassis with nice motherboard: SYSSUP60474R Supermicro SSG-6047R-E1R24L 4U Dual LGA2011
Two nice processors: CPUINTX260VR Intel Xeon Quad-Core E5-2609V2 2.5GHz Ivy Bridge-E
128GB ECC RAM: MEMDDR316G3R D629R DDR3-1600 16GB ECC
I have 20 SAS 4TB drives and six 6G SSD drives for Cache & Logs
My application is ESXi 5.5 and I will be supporting 4 VM Hosts that currently have 50 VMs running.
Currently I am testing configurations using ten 4TB SAS drives and a mirrored pair of 120GB 6G SSD for logs, and at this time I am not using any SSDs for Cache. Yesterday I was testing if size of SSD pools for cache helped or hurt and my testing kept saying less was better. This morning I started testing with no cache as each hard drive has 128 MB of cache and my FreeNAS box has 128GB of ECC RAM.
The first couple of tests today have no SSD cache and were done with an Extent that said LUN RPM = SSD.
I am using 4TB Seagate Constellation ES.3 SAS 7,200RPM hard drives and my average read/write speeds with no SSDs as cache is 80.7MB/s.
I deleted my Extent and recreated it and put the LUN RPM at 7,200RPM and my average read/write dropped to 80.2MB/s.
Next I deleted my Extent and recreated it and put the LUN RPM at 15,000RPM and my average read/write went up to 94.5MB/s. For testing purposes I am using 4.5GB files controlled by an ESXi host server using my FreeNAS storage as well as the server's SSD LUN and HD LUN.
So when using FreeNAS 9.3 - How important is accurate LUN RPM setting in Extent? Is there much/any danger of corrupting data?
Thanks group for any thoughts or inputs.
Two nice processors: CPUINTX260VR Intel Xeon Quad-Core E5-2609V2 2.5GHz Ivy Bridge-E
128GB ECC RAM: MEMDDR316G3R D629R DDR3-1600 16GB ECC
I have 20 SAS 4TB drives and six 6G SSD drives for Cache & Logs
My application is ESXi 5.5 and I will be supporting 4 VM Hosts that currently have 50 VMs running.
Currently I am testing configurations using ten 4TB SAS drives and a mirrored pair of 120GB 6G SSD for logs, and at this time I am not using any SSDs for Cache. Yesterday I was testing if size of SSD pools for cache helped or hurt and my testing kept saying less was better. This morning I started testing with no cache as each hard drive has 128 MB of cache and my FreeNAS box has 128GB of ECC RAM.
The first couple of tests today have no SSD cache and were done with an Extent that said LUN RPM = SSD.
I am using 4TB Seagate Constellation ES.3 SAS 7,200RPM hard drives and my average read/write speeds with no SSDs as cache is 80.7MB/s.
I deleted my Extent and recreated it and put the LUN RPM at 7,200RPM and my average read/write dropped to 80.2MB/s.
Next I deleted my Extent and recreated it and put the LUN RPM at 15,000RPM and my average read/write went up to 94.5MB/s. For testing purposes I am using 4.5GB files controlled by an ESXi host server using my FreeNAS storage as well as the server's SSD LUN and HD LUN.
So when using FreeNAS 9.3 - How important is accurate LUN RPM setting in Extent? Is there much/any danger of corrupting data?
Thanks group for any thoughts or inputs.