Highlighted
midsan
1 Copper

Throttle host IO from backend

Is there a way to throttle host IO on the backend ? We have a datawarehouse that does a dump every night. Rest of the day the ios are minimal.

But during the dump, the host causes the WP pending to touch 90% thereby affecting overall symmetrix performance.

20 devices occupy almost all of the cache slots (upto 5% each) ..

Labels (1)
0 Kudos
3 Replies
sauravrohilla
3 Cadmium

Re: Throttle host IO from backend

you can think about Dynamic Cache partitioning or QOS...

0 Kudos
midsan
1 Copper

Re: Throttle host IO from backend

Thanks Suarabh...

We are looking at DCP. BTW, is it possible to QoS thin devices (non BCV, non SRDF)

0 Kudos
Quincy561
4 Tellurium

Re: Throttle host IO from backend

There isn't any QoS that will help with this case.  DCP is a perfect solution, however if the box is VP (thin), don't let the target value on the Default partition get too small.  I recommend no smaller than 50% for the default.  The partition you are putting these dump devices in should be small anyway, around 10% target value should work well.

0 Kudos