HAST initial sync speed

[Siniša Denić]

>There have been several changes since
>that thread was started related to the synchronization speed issue
That's what happening to me, syncing 37GB takes more then 30min over 1Gb network, I have two Fujitsu Siemens Esprimo nodes with two seagate sata2 150MB/s running freebsd-9.1-amd64 version.



Siniša Denić 
INTECH DOO 
www.intech.co.rs 


----- Original Message -----
From: "Mikolaj Golub" <trociny at FreeBSD.org>
To: "intech" <sdenic at intech.co.rs>
Cc: freebsd-fs at freebsd.org
Sent: Thursday, June 13, 2013 10:53:45 PM
Subject: Re: HAST initial sync speed

On Thu, Jun 13, 2013 at 04:39:41AM -0700, intech wrote:
> Thought this threat is almost 3 years old, I want to ask if this
> MAX_SEND_SIZE adopted in freebsd 8.3 and even fbsd9.1?
> Indeed I have the same issue on 1Gb network - nodes performing sync at only
> 10MBytes/sec ?! and I can't figure out what is happening as network itself
> is not the problem, I tested it.

What version are you running? There have been several changes since
that thread was started related to the synchronization speed issue
(MAX_SEND_SIZE among them). It is recommended to use recent versions.

> And just one question fullsync is only option for HAST replication at time
> of writing, so could HAST perform at 100MB/sec in this mode, and  when we
> expect memsync and async to be released?

Synchronization is run in background by synchronization thread and
hardly depends on replication mode. Anyway, HAST from CURRENT,
STABLE/9 and STABLE/8 supports all three modes. The async mode was
merged to stable branches in Jan 2012, and reached 8.4 and 9.1 (I am
not sure about the later, one needs to check). The memsync mode was
merged in Apr 2013, after 8.4 freeze, so there is no release that
would contain it yet.

-- 
Mikolaj Golub