[OmniOS-discuss] Zil Device

[Schweiss, Chip]

The 850 Pro should never be used as a log device.  It does not have power
fail protection of its ram cache.   You might as well set sync=disabled and
skip using a log device entirely because the 850 Pro is not protecting your
last transactions in case of power failure.

Only SSDs with power failure protection should be considered for log
devices.

That being said, unless your running application that need transaction
consistency such as databases, don't bother with using a log device and set
sync=disabled.

-Chip

On Thu, Jul 16, 2015 at 11:55 AM, Doug Hughes <doug at will.to> wrote:

> 8GB zil on very active server and 100+GB ssd lasts many years. We have
> yet, after years of use of various SSDs, to have one fail from wear usage,
> and that's with fairly active NFS use.
> They usually fail for other reasons.
> We started with with Intel X series, which are only 32GB in size, and some
> of them are still active, though less active use now. With Samsung 850 pro,
> you practically don't have to worry about it, and the price is really good.
>
>
> On Thu, Jul 16, 2015 at 12:36 PM, Brogyányi József <brogyi at gmail.com>
> wrote:
>
>>  Hi Doug
>>
>> Can you write its life time? I don't trust any SSD but I've thinking for
>> a while to use as a ZIL+L2ARC.
>> Could you share with us your experiences? I would be interested in server
>> usage. Thanks.
>>
>>
>>
>> 2015.07.15. 22:42 keltezéssel, Doug Hughes írta:
>>
>> We have been preferring commodity SSD like Intel 320 (older), intel 710,
>> or currently, Samsung 850 pro. We also use it as boot drive and reserve an
>> 8GB slide for ZIL so that massive synchronous NFS IOPS are manageable.
>>
>> Sent from my android device.
>>
>> -----Original Message-----
>> From: Matthew Lagoe <matthew.lagoe at subrigo.net>
>> <matthew.lagoe at subrigo.net>
>> To: omnios-discuss at lists.omniti.com
>> Sent: Wed, 15 Jul 2015 16:29
>> Subject: [OmniOS-discuss] Zil Device
>>
>>  Is the zeusram SSD still the big zil device out there or are there other
>> high performance reliable options that anyone knows of on the market now?
>> I
>> can't go with like the DDRdrive as its pcie.
>>
>> Thanks
>>
>>
>> _______________________________________________
>> OmniOS-discuss mailing list
>> OmniOS-discuss at lists.omniti.com
>> http://lists.omniti.com/mailman/listinfo/omnios-discuss
>>
>>
>> _______________________________________________
>> OmniOS-discuss mailing listOmniOS-discuss at lists.omniti.comhttp://lists.omniti.com/mailman/listinfo/omnios-discuss
>>
>>
>>
>> _______________________________________________
>> OmniOS-discuss mailing list
>> OmniOS-discuss at lists.omniti.com
>> http://lists.omniti.com/mailman/listinfo/omnios-discuss
>>
>>
>
> _______________________________________________
> OmniOS-discuss mailing list
> OmniOS-discuss at lists.omniti.com
> http://lists.omniti.com/mailman/listinfo/omnios-discuss
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omniosce.org/ml-archive/attachments/20150716/2d96c190/attachment.html>