I can't speak to the SoftIron solution, but I have done some testing on an all-SSD environment comparing latency, CPU, etc between using the Intel ISA plugin and using Jerasure. Very little difference is seen in CPU and capability in my tests, so I am not sure of the benefit.
David Byte
Sr. Technology Strategist
SCE Enterprise Linux
SCE Enterprise Storage
Alliances and SUSE Embedded
dbyte@xxxxxxxx
918.528.4422
On 6/14/19, 2:50 PM, "ceph-users on behalf of Brett Niver" <ceph-users-bounces@xxxxxxxxxxxxxx on behalf of bniver@xxxxxxxxxx> wrote:
Also the picture I saw at Cephalocon - which could have been
inaccurate, looked to me as if it multiplied the data path.
On Fri, Jun 14, 2019 at 8:27 AM Janne Johansson <icepic.dz@xxxxxxxxx> wrote:
>
> Den fre 14 juni 2019 kl 13:58 skrev Sean Redmond <sean.redmond1@xxxxxxxxx>:
>>
>> Hi Ceph-Uers,
>> I noticed that Soft Iron now have hardware acceleration for Erasure Coding[1], this is interesting as the CPU overhead can be a problem in addition to the extra disk I/O required for EC pools.
>> Does anyone know if any other work is ongoing to support generic FPGA Hardware Acceleration for EC pools, or if this is just a vendor specific feature.
>>
>> [1] https://www.theregister.co.uk/2019/05/20/softiron_unleashes_accepherator_an_erasure_coding_accelerator_for_ceph/
>
>
> Are there numbers anywhere to see how "tough" on a CPU it would be to calculate an EC code compared to "writing a sector to
> a disk on a remote server and getting an ack back" ? To my very untrained eye, it seems like a very small part of the whole picture,
> especially if you are meant to buy a ton of cards to do it.
>
> --
> May the most significant bit of your life be positive.
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