Re: Converting system to raid

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



jim owens wrote:
To continue the pointless (but maybe entertaining) argument :)

Jeff Garzik wrote:
jim owens wrote:
The filesystem mod-time might have nanoseconds in it, but
that does not mean 2 writes 100 nanoseconds apart will have
different mod-times.

Modern Linux filesystems absolutely do do metadata updates at that level of granularity.

In filesystems it only counts if it makes it to disk.

10,000,000 write-to-disk metadata updates per second?  I think not.

Does every write (mtime update) trigger a write to disk? I think not :) You can write (== update inode mtime) 10,000,000 times, without ever touching disk. Yet you fstat() still returns a nanosecond-granularity mtime.

	Jeff


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

[Index of Archives]     [Linux RAID Wiki]     [ATA RAID]     [Linux SCSI Target Infrastructure]     [Linux Block]     [Linux IDE]     [Linux SCSI]     [Linux Hams]     [Device Mapper]     [Device Mapper Cryptographics]     [Kernel]     [Linux Admin]     [Linux Net]     [GFS]     [RPM]     [git]     [Yosemite Forum]


  Powered by Linux