[CentOS] 4.4/64-bit Supermicro/ Nvidia RAID [thanks]
John R Pierce
pierce at hogranch.com
Tue Dec 12 16:31:00 UTC 2006
>
> Yes it does if you have a journaling filesystem. For example,
> fsync/fsyncdata calls get special treatment on filesystems like ext3.
> When the filesystem containing the files on which fsync is called and
> it is mounted data=journal, those writes hit the filesystem journal
> first after which the fsync gets to say OK. After that the kernel will
> write from the journal to the rest of the disk at its leisure.
I thought file system journals like ext3 were just used for the file
system metadata? inode allocations and directory updates and so forth,
not actual user data?.
If I understand what you're suggesting, if I write 200MB of data then
fsync, my -data- is written to the journal, then later written to the
actual file system?
anyways, I seriously doubt we could convince operations at our
manufacturing facilities to add ramdrives to their mostly HP servers. I
don't even know if they'd fit in the blade servers most commonly used.
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