Aug. 6, 2013
7:53 a.m.
On Tue, Aug 6, 2013 at 1:20 PM, Prashant Shah <pshah.mumbai@gmail.com> wrote:
Hi,
On Tue, Aug 6, 2013 at 1:15 PM, Rajat Sharma <fs.rajat@gmail.com> wrote:
How are you reading and writing? What is your test utility? 'dd' has an option to specify iflag/oflag=direct, which would bypass buffer cache. But anyways this problem should not happen even if data is written to cache, you should read it back from cache.
I am using cat command. Its a block that belongs to a file and I am directly writing to the block. On reading the file I am getting stale data.
Most likely you are getting stale data from filesystem page-cache. Please don't use cat, use dd with iflag/oflag=direct.
Regards.
-Rajat