From: March Jane <unix.march@gmail.com>
To: Vincent JARDIN <vincent.jardin@6wind.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Scenario of dpdk-iokit //Re: Fwd: dpdk-iokit: Turn dpdk into the IO field.
Date: Tue, 19 Nov 2013 17:56:48 +0800 [thread overview]
Message-ID: <A144C8B9-7BF3-4FF6-A49C-ECEAE685CB0B@gmail.com> (raw)
In-Reply-To: <528B3346.3050100@6wind.com>
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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@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
>>
>>
>>
next prev parent reply other threads:[~2013-11-19 9:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <D3C3E0F5-8023-4B2A-B1E5-71B9BEEFFD94@gmail.com>
2013-11-12 10:27 ` [dpdk-dev] " March Jane
[not found] ` <521D9455-820A-4F8F-A7E7-8380EE1415DF@intel.com>
[not found] ` <E39234CF-B93A-4178-ABA1-452F8051A9A8@intel.com>
[not found] ` <877C1F8553E92F43898365570816082F1ADE612D@IRSMSX103.ger.corp.intel.com>
[not found] ` <47C784D99F4D124BB2973FE5C27BDCF12FB36570@FMSMSX109.amr.corp.intel.com>
[not found] ` <7F974523047D074590B0CBEB8DDF43A70E516CFB@FMSMSX104.amr.corp.intel.com>
[not found] ` <47C784D99F4D124BB2973FE5C27BDCF12FB374A9@FMSMSX109.amr.corp.intel.com>
[not found] ` <9F232B325D833F4494EFCD5B9D49F6C719D5CFC8@IRSMSX103.ger.corp.intel.com>
[not found] ` <00B2C372B6E6DA4FB04934511BF0564A3DE6AEC9@FMSMSX114.amr.corp.intel.com>
2013-11-19 1:22 ` [dpdk-dev] Scenario of dpdk-iokit //Re: " March Jane
[not found] ` <528B3346.3050100@6wind.com>
2013-11-19 9:56 ` March Jane [this message]
2013-11-19 10:29 ` Vincent JARDIN
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