Gratitude to reply.
FCP and Full-offload iSCSI will be nice, for example Qlogic 16Gbps FCP.
But IO scenario is very different from IP scenario as my understanding.
March
BTW: Do you have people at Bay Area?
PS:
Already finished header file for dpdk-iokit/libiokit_sctgt
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On Nov 19, 2013, at 5:45 PM, Vincent JARDIN <vincent.jardin at 6wind.com> wrote:
> (off list since it coul become a troll ;) )
>
> At 6WIND, we developed a librte_crypto as a generic framework to manage any
> crypto framework:
> - Intel's QuickAssist
> - Cavium' Nitrox II
> - AES/NI SW crypto
>
> it was required in order to manage high rate of PCI IOs for Cryptos (IPsec,
> SSL, etc...)
>
> So, after the librte_pmd_mlx4, Virtio, Vmxnet3, that's more than 6 ultra low
> latency/very efficient drivers that we added into the DPDK and promoted.
>
> Which storage drivers would you foresee first to be run in userland?
>
> Best regards,
>
>
> On 19/11/2013 02:22, March Jane wrote:
>>
>> ? Nowadays dilemmas in enterprise-class storage system & motivation --
>>
>> The model of most storage system is ?Front-end cards + CPU +
>> back-end magnetic media hard drive?, in such system, the hard drive is very
>> slow in terms of its capability in random accessing - roughly 200IO per
>> second, in contrast, the processor is very fast, therefore many software
>> stack can tolerate waste of CPU cycle for exploiting capabilities of hard
>> drive.
>>
>> In addition, regularly software for SAN is developed under kernel space
>> in order to achieve low latency - few milliseconds per request, and IO
>> pressure in scenario of heavy workload. Usually software in user-space with
>> POSIX is slow. However kernel-space developing is nightmare for engineers,
>> even we have approaches to simulate these code under user-space.
>>
>> However, so far flash is coming to popular, the gap between CPU and
>> media is overturned, a single flash card can be easy to reach 1M iops, if
>> plug 10 such cards inside a server, the processor is hard to back. Thus,
>> today?s challenge in flash storage is to exploit the capability of
>> processor, ironically. In addition to this purpose, move to user-space is
>> also a motivation, if move to user-space is OS-bypass rather than moving to
>> POSIX.
>>
>>
>> Best
>>
>> - March
>>
>>
>>
