Volodymyr Kostyrko wrote:
I have some setups were gjournal was put on device rather the on
partition, i.e.:
[umgah] ~> gmirror status
Name Status Components
mirror/umgah0 COMPLETE ad0
ad1
[umgah] ~> gjournal status
Name Status Components
mirror/umgah0.journal N/A mirror/umgah0
[umgah] ~> glabel status
Name Status Components
ufs/umgah0root N/A mirror/umgah0.journala
label/umgah0swap N/A mirror/umgah0.journalb
ufs/umgah0usr N/A mirror/umgah0.journald
ufs/umgah0var N/A mirror/umgah0.journale
Does the above suggest that you've ended up with individual journal
providers for each partition anyway? If so, where are they and have you
really achieved anything functionally different? Are they at the end of
their individually associated partitions or all together somewhere else?
Has the ill-advised journaled small partition issue been successfully
overcome through what you've done?
[umgah] ~> mount
/dev/ufs/umgah0root on / (ufs, asynchronous, local, noatime, gjournal)
devfs on /dev (devfs, local)
/dev/md0 on /tmp (ufs, asynchronous, local)
/dev/ufs/umgah0var on /var (ufs, asynchronous, local, noatime, gjournal)
/dev/ufs/umgah0usr on /usr (ufs, asynchronous, local, noatime, gjournal)
devfs on /var/named/dev (devfs, local)
And yes, mirror autosynchronization is turned off, gjournal takes care
of that too.
It's not stated in manual, but gjournal is typically transparent for any
type of access, just in case of UFS file system is marked as journaled
so any metadata writes can be distinguished from data writes. Without
that gjournal does literally nothing.
And what does this mean for your swap partition?
Laszlo Nagy wrote earlier:
Another tricky question: why would you journal a SWAP partition?
Volodymyr, does your assertion that gjournal does nothing when a file
system is not UFS mean that there is no penalty with regard to your swap
partition despite the existence of "mirror/umgah0.journalb"?
Any chance you'd like to share your command sequence for constructing
your gmirror'd and gjournal'd filesystem, Volodymyr? :-)
Carl / K0802647
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