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P2000 G3, increase performance by replacing HDDs with SSDs ?

 
Christian Schulze
Regular Advisor

P2000 G3, increase performance by replacing HDDs with SSDs ?

 
Hi,


We have a performance issue with a lvol in a P2000.


System is a 2-Node Serviceguard Cluster. It uses a lvol which is lvm-mirrored on 2 separate P2000 G3.

each of the P2000 presents a vdisk which consists of 6 500GB disks in a RAID5.


IO is very high (about 600 clients via Samba, and 80 clients via NFS)


I think we will really get a benefit if we swap the 6x 500GB HDD with

5x J9F38A HP MSA 800GB 12G SAS ME 2.5in EM SSD

 

Is this supported ? Is there a good chance that performance increases ?

 


here are some numbers (reading a 2,3GB depot File)


# ll hpux_11.31_QPK_03.2015.tar
-rwxrwxr-x   1 ntadmin    ntusers    2335469056 Mar 24 16:20 hpux_11.31_QPK_03.2015.tar

# date; timex cat hpux_11.31_QPK_03.2015.tar >> /dev/null
Mon Mar 30 12:01:34 MESZ 2015

real     5:13.26
user        0.21
sys         8.38


# date; timex cat hpux_11.31_QPK_03.2015.tar >> /dev/null
Mon Mar 30 12:45:33 MESZ 2015

real     3:13.85
user        0.20
sys         7.20


# date; timex cat hpux_11.31_QPK_03.2015.tar >> /dev/null
Mon Mar 30 14:09:54 MESZ 2015

real       59.39
user        0.19
sys         7.17


# date; timex cat hpux_11.31_QPK_03.2015.tar >> /dev/null
Mon Mar 30 14:11:15 MESZ 2015

real     5:48.33
user        0.20
sys         8.51


# date; timex cat hpux_11.31_QPK_03.2015.tar >> /dev/null
Mon Mar 30 14:20:00 MESZ 2015

real     1:13.29
user        0.19
sys         7.68


# date; timex cat hpux_11.31_QPK_03.2015.tar >> /dev/null
Mon Mar 30 14:33:05 MESZ 2015

real     4:21.50
user        0.20
sys         7.13


Thanks Christian

never touch a running system