Someone please correct me if I am wrong, but that seems a bit large of
an MDT. Of course drives these days are pretty good sized, so the extra
is probably very inexpensive.
Also, isn't it better to have 1 OST per OSS for parallelism rather than
adding OSTs to an OSS? I've been doing most of my OSTs as ZFS and
letting that handle parallel writes across drives within an OSS, which
has performed well.
Brian Andrus
On 10/30/2017 12:04 PM, Amjad Syed wrote:
The vendor has proposed a single MDT ( 4 * 1.2 TB) in RAID 10
configuration.
The OST will be RAID 6 and proposed are 2 OST.
On Mon, Oct 30, 2017 at 7:55 PM, Ben Evans <[email protected]
<mailto:[email protected]>> wrote:
How many OST's are behind that OSS? How many MDT's behind the MDS?
From: lustre-discuss <[email protected]
<mailto:[email protected]>> on behalf of
Brian Andrus <[email protected] <mailto:[email protected]>>
Date: Monday, October 30, 2017 at 12:24 PM
To: "[email protected]
<mailto:[email protected]>"
<[email protected]
<mailto:[email protected]>>
Subject: Re: [lustre-discuss] 1 MDS and 1 OSS
Hmm. That is an odd one from a quick thought...
However, IF you are planning on growing and adding OSSes/OSTs,
this is not a bad way to get started and used to how everything
works. It is basically a single stripe storage.
If you are not planning on growing, I would lean towards gluster
on 2 boxes. I do that often, actually. A single MDS/OSS has zero
redundancy, unless something is being done at harware level and
that would help in availability.
NFS is quite viable too, but you would be splitting the available
storage on 2 boxes.
Brian Andrus
On 10/30/2017 12:47 AM, Amjad Syed wrote:
Hello
We are in process in procuring one small Lustre filesystem giving
us 120 TB of storage using Lustre 2.X.
The vendor has proposed only 1 MDS and 1 OSS as a solution.
The query we have is that is this configuration enough , or we
need more OSS?
The MDS and OSS server are identical with regards to RAM (64 GB)
and HDD (300GB)
Thanks
Majid
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