From: Eric Sandeen <sandeen@sandeen.net>
To: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Cc: "xfs@oss.sgi.com" <xfs@oss.sgi.com>
Subject: Re: xfs_growfs / planned resize / performance impact
Date: Thu, 02 Aug 2012 23:03:10 -0500 [thread overview]
Message-ID: <501B4D7E.1000303@sandeen.net> (raw)
In-Reply-To: <5017E426.2040709@profihost.ag>
On 7/31/12 8:56 AM, Stefan Priebe - Profihost AG wrote:
> Hello list,
>
> i'm planning to create a couple of VMs with just 30GB of space while using xfs as the main filesystem.
>
> Now i alreay know that some of the VMs will grow up to 250GB while resizing the block device and using xfs_growfs.
>
> Should i take care of that and format these disks with special parameters?
>
> I've discovered that a 500GB volume has agcount=4 and 64000 blocks of internal log - while a 300GB volume resized to 500GB has agcount 7 ad only 40960 blocks of internal log.
>
> Is it a problem if this grow will happen in small portions (30GB => 50GB => 75GB => 100GB => ... 300GB)?
This incremental part doesn't matter a bit. The first mkfs will choose the AG count & size according to defaults; further growth after this will add new (possibly partial) AGs of that pre-chosen size.
-Eric
> Thanks!
>
> Greets,
> Stefan
>
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next prev parent reply other threads:[~2012-08-03 4:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-31 13:56 xfs_growfs / planned resize / performance impact Stefan Priebe - Profihost AG
2012-07-31 17:27 ` Stan Hoeppner
2012-08-03 4:03 ` Eric Sandeen [this message]
2012-08-03 6:09 ` Stefan Priebe - Profihost AG
2012-08-03 13:46 ` Eric Sandeen
2012-08-05 11:03 ` Martin Steigerwald
2012-08-05 12:34 ` Stan Hoeppner
2012-08-05 13:49 ` Martin Steigerwald
2012-08-05 20:26 ` Stan Hoeppner
2012-08-05 15:54 ` Stefan Priebe
2012-08-06 11:42 ` Michael Monnerie
2012-08-04 22:43 ` Dave Chinner
2012-08-05 5:46 ` Stefan Priebe
2012-08-05 11:06 ` Martin Steigerwald
2012-08-05 11:35 ` Andy Bennett
2012-08-05 20:57 ` Dave Chinner
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