Linux XFS filesystem development
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From: "Halsey Pian" <halsey.pian@gmail.com>
To: linux-xfs@vger.kernel.org
Cc: halsey.pian@gmail.com
Subject: With respect to XFS Bitmap flush to disk
Date: Mon, 27 Feb 2017 10:11:44 +0800	[thread overview]
Message-ID: <004e01d2909e$d9ce1580$8d6a4080$@gmail.com> (raw)
In-Reply-To: 

Dear All,

Recently, I try to read analyze the bitmap of XFS file system, it seems that I cannot read the latest bitmap from hard disk involving the XFS, and cannot read the accurate info even after a long time. For example, i cannot get the relevant bitmap info after I add/delete a big file to/from XFS file system.

I tried several solution, and find it out that I must execute xfs_freeze for the XFS partition in CentOS7, and it seems that xfs_freeze doesn’t work for XFS version included in Redhat6.5, I must umount/mount the xfs, then I can get the latest bitmap info related to the latest data located in disk.

What  strategy does XFS use to cache/flush bitmap to hard disk?  How can I get the accurate bitmap info especially for Redhat6 series Operating System? Could you please give help on it?

Thanks in advance! ☺




Halsey Pian 



             reply	other threads:[~2017-02-27  2:13 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-27  2:11 Halsey Pian [this message]
2017-02-27 11:23 ` With respect to XFS Bitmap flush to disk Stefan Ring
2017-02-27 15:33 ` Eric Sandeen

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