How to best use SSD & Spin Disk mixed machines?

Elastic Stack Elasticsearch
1

Hi,

My machine has both SSD and HHD. SSD is small but HHD is very large. So i'm
wondering if there's anyway to control allocate newer hot indexes to SSD
and move them to HHD when they get older. Any suggestions?

Best Regards

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2

It makes sense but in that case I think it will require to have two nodes on the same machine.
One node using HHD and the other one using SSD.

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David Pilato | Technical Advocate | Elasticsearch.com
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Le 27 févr. 2015 à 07:59, liu wei liu.liuwei.wei@gmail.com a écrit :

Hi,

My machine has both SSD and HHD. SSD is small but HHD is very large. So i'm wondering if there's anyway to control allocate newer hot indexes to SSD and move them to HHD when they get older. Any suggestions?

Best Regards

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3

ES uses RAM for search. This is 1000x faster than SSD. There is not much
benefit to combine SSD and HDD within ES from the perspective of frequently
used / rarely used indices. Rarely used indices can be moved to smaller
machines with slower I/O and less RAM.

Optimal use of SSD is heavy bulk indexing. The SSDs should be large enough
to hold all the data files of the indices. Copying indexes to HDD would add
ony more load and costs on such machines.

Jörg

On Fri, Feb 27, 2015 at 7:59 AM, liu wei liu.liuwei.wei@gmail.com wrote:

Hi,

My machine has both SSD and HHD. SSD is small but HHD is very large. So
i'm wondering if there's anyway to control allocate newer hot indexes to
SSD and move them to HHD when they get older. Any suggestions?

Best Regards

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.
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