emc241591: NAS 6.0 does not support LUNs where CLARiiON Auto-Tiering, Compression, or dense Pool-based LUNs are enabled

Certainly FAST based LUNs and LUNs using compression arent supported for use by the Celerra for NAS

Pool based LUNs – I am not sure

Check the release notes for the latest 6.0.x

What would be the reason for asking or using them ?

Sorry – you have to go through normal performance troubleshooting and maybe a support case

Low write performance can have a number of reasons like

Network – packets getting lost

Disk layout – not enough disks or not enough LUNs for enough outstanding IOs

Test tools – Windows explorer for example isnt very clever, single stream vs. aggregate performance

Checkpoints – COFW does make a difference, savvols shouldn’t be on FastCache, ….

Client issues

…..

I would suggest to reduce to the simplest config – one interface (no trunking), no checkpoints and start troubleshooting from there

You can also try a simple protocol to test the network like ftp or ttcp

P.S.: meta LUNs are not supported for NAS usage – AVM does its own striping

Hi Rainier,

I wanted to use FastVP becasue we have 3 tiers in the NS120 and I thought to use auto. tiering.

But I didn´t read the release notes and though the NS120 can be handeled even like a VNX.

So I created standard Raid5 (4+1) and (8+1) over 60 FC 15K disks, Raid 1/0 over 14 SATA disks and 2 EFD dirves as fast cache.

Now it works, I can see all the LUNs as Storage Pools in the file area.

But I have one BIG problem, perhaps you can help me.

We have only about 12 MB/sec wirte performance on the deinfed CIFS shares, read performance is good, it´s at 90-100 MB/sec.

We have a lacp trunk ober 4 x 1GBit.

I cretaed the luns for the file pool manually, as described in the best practice.

Following config:

3 x R5(4+1) --> each 2 LUNs with equal sice one SPAA one SPB.

6 LUNs in the r5_performance_pool.

1 Filesystem on this pool.

In the analyzer I can see that all 15 disks are equaly used, but only with about 10MB/sec.

Any idea what I can do to get the system write performance higer. I although edited the fastRTO settings for the datamovers to the value 2 as I read some times in this forum.

Over this night I have cretaed some metaluns on other drives and will add them to the file storage, perhaps this works better....

You can use FLR to move files to a lower cost tier - not quite the same as FAST but a nice feature/option as well..

Mark wrote: You can use FLR to move files to a lower cost tier - not quite the same as FAST but a nice feature/option as well..

Sorry, just to clarify, did you maybe mean FMA?

Yup,  I did mean that.  Thanks!

I think you mean CTA (formerly called FMA or the FileMover/DHSM API)

FLR (aka. CWORM) sets file into a rentention state so that they cant be deleted or modified – it never moves files

Yeah, good catch - It was late