Best survey practice: tiering with different types of storage drives

Hello

We recently received a new SAN Equallogic, and I am deciding the implementation. Our first unit (currently only one member in a swimming pool) is a PS4100 with 24x600GB 10K SAS. The new unit is a PS4210 with 12x4TB 7.2 K NL SAS.

Should I leave units in separate classes in the same group and cut new LUNS? Should I add the PS4210 in the existing pool and use the Storage Tiering?

I'm a little hesitant to how Storage Tiering will work, I read a little when the mixture of types of disks, storage tiering will be balanced on the ability, and most of the i/o load will hit the higher capacity of SAN.

Any contribution is appreciated. The storage is used for the storage of data VMFS with vSphere 5.5 cluster. Run EQL firmware 8.1.0 on both units.

Hello

Either will work.   As a general rule, speaking of small members 10K / 15K mix with very large 7.2 K members RPM can reduce the effectiveness of the fastest disks.  As more data on the largest Member.  This is especially true if they carry the same RAID type.

I would start with them in their own pools.  Later, you can merge two pools quite easily.  The other way is more complex.  Since you need to remove a member, leaving the data in the original pool.  Then you can move volumes of the new pool.

Also, please check Dell TR1091.  It explains how to configure the storage w/EQL ESXi.

en.Community.Dell.com/.../Download

A small change that has not been added that TR is the NOOP_TIMEOUT value.  The document shows you how to change the LOGIN_TIMEOUT value to 60.  In this menu is the NOOP_TIMEOUT, which gets the value of 30 seconds.

Finally, make sure that the virtual machines themselves are configured with their disk values set on 60 seconds Timeout.

With the EQL Firmware download is a PDF entitled ' iSCSI initiator and optimize your SAN environment for high availability of the OS considerations "which explains how to make the necessary changes.

Kind regards

Don

Tags: Dell Products

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