On 2018年01月03日 09:55, robbieko wrote:
> Hi Qu,
>
> Do you have a patch to reduce meta rsv ?
Not exactly, only for qgroup.
[PATCH v2 10/10] btrfs: qgroup: Use independent and accurate per inode
qgroup rsv
But that could provide enough clue to implement a smaller meta rsv.
My current safe
Hi Qu,
Do you have a patch to reduce meta rsv ?
Hi Peter Grandi,
1. all files have been initialized with dd, No need to change any
metadata.
2. my test with Total volume size 190G, used 128G, available 60G, but
only 60 MB dirty pages.
According to the meta rsv rules, 1GB free space up
> When testing Btrfs with fio 4k random write,
That's an exceptionally narrowly defined workload. Also it is
narrower than that, because it must be without 'fsync' after
each write, or else there would be no accumulation of dirty
blocks in memory at all.
> I found that volume with smaller free
On 2018年01月02日 15:51, robbieko wrote:
> Hi All,
>
> When testing Btrfs with fio 4k random write, I found that volume with
> smaller free space available has lower performance.
>
> It seems that the smaller the free space of volume is, the smaller
> amount of dirty page filesystem could have.
>
Hi All,
When testing Btrfs with fio 4k random write, I found that volume with
smaller free space available has lower performance.
It seems that the smaller the free space of volume is, the smaller
amount of dirty page filesystem could have.
There are only 6 MB dirty pages when free space of
