R720 with H710P CacheCade Question

Try to review my server to optimize the performance of the database. I have not used cachecade before and thought I would give it a whirl in my server to see if it helps the performance of the database. It is difficult to get a good reading on H710P cachecade information and most of the information that Dell released are overview of quite high level. I read that cachecade 2.0 is not available on the H710P but the Dell announcement talk to this topic was very old - is - this always true and only cachecade 1.1 is supported as a read-only cache?

I had a hard time pinning the up-to-date information on SSD drives supported for use with cachecade. I ended up buying a couple PRO Samsung 850 128 GB disks that I read a few posts saying those worked well even if the information was not directly from Dell. Since it is read-only cachecade I guess that these should last long enough to make it worth it. Replacement of these would not be a problem if they wear. Don't know what kind of life to wait on these but without doubt it would be decent enough. SLC would be only a reasonable option if MLC drives break down quickly.

The last unknown is how cachecade is applied to virtual devices. Is a global array of cachecaid for the full set of disks virtual or you have to associate it with a virtual disk? Specifically, I want to use this for my database server (Sybase ASE 15.7). Right now my guest Sybase is on a disc of 8 15 K SAS 300 GB RAID10 array. Performance is OK, but I would like to speed up data is critical for accessibility within a reasonable time of the access.

The good news is I have a test server I get to test this, but is not unfamiliar with the cachecade and the best way to get performance, I thought I'd ask.

Currently, I have 2 bays (without cachecade).

RAID5 DATASTORE1 = 8 x 300 GB 10 K drives in a RAID5 SAS configuration for customers of host and vmware ESXi.

RAID10 DATASTORE2 = 8 x 300 GB 15 K SAS drives in RAID10 for guest Sybase ASE (RHEL6).

Here's what I think about doing (all tips are appreciated):

Hello

Robert Clemens
I read that cachecade 2.0 is not available on the H710P but the Dell announcement talk to this topic was very old - is - this always true and only cachecade 1.1 is supported as a read-only cache?

Yes, cachecade 2.0 is never out on our PERCs. We completely fell cachecade and moved to Sandisk DAS Cache on the following generations. You can read more here:

http://www.Dell.com/learn/us/en/04/server-technology-components-caching

Robert Clemens
The last unknown is how cachecade is applied to virtual devices. Is a global array of cachecaid for the full set of disks virtual or you have to associate it with a virtual disk?

This is global. There are very few options available when configuring cachecade. You can create, delete, or appoint a disk virtual cachecade. The rest of your questions should be answered in this article:

http://www.Dell.com/support/article/us/en/19/SLN156203/en

There are two things to note in this article:

  1. He said several times that ONLY 1 GB of the H700 version supports cachecade. This is true, but the functionality has been included with the 512 MB of the H700 version by mistake. To my knowledge we have not removed the 512 MB version cachecade feature, but the feature is not supported on this card and maybe it's not available in all versions of firmware of this card.
  2. In this article, it says that ONLY the SSD with Dell identifiers are supported. I don't know if we block explicitly not Dell readers in cachecade bays. If you decide to use 3rd party records then I would recommend that you make that you can use them elsewhere or make them if they do not work properly. If you use 3rd party readers indicating another site will work, then keep in mind that no matter what firmware change for readers or the controller can cause communication problems. We optimize our controller and firmware of the drive for our PERCs and hard drives. Design us not the firmware for compatibility with other products.

Thank you

Tags: Dell Servers

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    I had a look at the multiple choice questions in Captivate, but they only appear to alow you to make a move with a "correct" answer and I'm looking for more than a navigational tool.  This feature is recorded under the heading "Quiz" or somewhere else or this function is simply not available in this tool?

    Thank you very much for your help,

    Michelle

    Hello

    Note that with the type of Multiple choice question, when you select one of the possible answers you have an Advanced button that can be clicked. You can then assign a different action for each answer choice. So answer one could go back 100 slides, answer b could open another project and c answer could perhaps open Google.

    See you soon... Rick

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