netdev - Re: [PATCH] bonding: added 802.3ad round-robin hashing policy for single TCP session balancing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 18 Jan 2011 20:21:02 +0300
From:	"Oleg V. Ukhno" <olegu@...dex-team.ru>
To:	John Fastabend <john.r.fastabend@...el.com>
CC:	Jay Vosburgh <fubar@...ibm.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] bonding: added 802.3ad round-robin hashing policy for
 single TCP session balancing

On 01/18/2011 07:41 PM, John Fastabend wrote:

>>
>> John, what is you opinion on such load balancing method in general,
>> without referring to particular use cases?
>>
>
> This seems reasonable to me, but I'll defer to Jay on this. As long as the
> limitations are documented and it looks like they are this may be fine.
>
> Mostly I was interested to know what led you down this path and why MPIO
> was not working as at least I expected it should. When I get some time I'll
> see if we can address at least some of these issues. Even so it seems like
> this bonding mode may still be useful for some use cases perhaps even none
> storage use cases.
>
>>

I was adressing several problems with my patch:
  - I was unable to consume whole bandwidth with multipath - with four 
1Gbit "paths" it was slightly above 2Gbit/s
  - Link failures caused quite often disk failures, which led to Oracle 
ASM rebalance, especially with versions below 11.
  - It is not always possible to autogenerate multipathd.conf with 
human-readable device names because of iscsi session id and scsi device 
bus/channel/etc mismatch(usually it differs by 1, but not necessarily), 
with bonding solution I can just look into /dev/disk/by-path to find out 
where physically is device, let's  say, /dev/sdab, located(it's just a 
free bonus I've got, so to say:)) .



-- 
С уважением,
руководитель службы
эксплуатации коммерческих и финансовых сервисов
ООО Яндекс

Олег Юхно


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html