Basically i think endurance is most important for a ceph journal,since the 
workload for journal is full write,you can easily caculate how long your ssd 
will burn out.. even we assume your ssd only run at 100MB/s in average,you will 
burn out 8TB/day and 240TB/month

DCS 3500 is definitely not useable in this case unless you want to swap your 
ssd every single month..



在 2013-7-22,22:47,"Mark Nelson" <mark.nel...@inktank.com> 写道:

> On 07/22/2013 09:30 AM, Gandalf Corvotempesta wrote:
>> 2013/7/22 Mark Nelson <mark.nel...@inktank.com>:
>>> I don't have any in my test lab, but the DC S3700 continues to look like a
>>> good option and has a great reputation, but might be a bit pricey. From that
>>> article it looks like the Micron P400m might be worth looking at too, but
>>> seems to be a bit slower.
>> 
>> DC S3500 should be the same (for a journal) but at lower price.
> 
> At least based on this:
> 
> http://www.hardcoreware.net/intel-dc-s3500-480gb-ssd-review/
> 
> The write speeds are lower at the same capacity and the endurance appears to 
> be significantly lower since the S3500 isn't using the HET cells.
> 
> Personally I'm still thinking the 200GB S3700 is the way to go, but I haven't 
> looked too closely at the micron drive or other options out there.  Something 
> like the Marvell Dragonfly could be very interesting for larger nodes, but I 
> haven't tested it yet.
> 
> Mark
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