> On Fri, Aug 13, 2010 at 05:14:22PM +0400, Andrey Panin wrote:
>> On 224, 08 12, 2010 at 05:29:37PM -0500,
bchociej@gmail.com wrote:
>> > From: Ben Chociej <bchociej@gmail.com>
>> >
>> > Modified mkfs.btrfs to add hot data relocation option (-h) which
>> > preallocates BTRFS_BLOCK_GROUP_DATA_SSD and
>> > BTRFS_BLOCK_GROUP_METADATA_SSD at mkfs time for future use by hot data
>> > relocation code. Also added a userspace function to detect whether a
>> > block device is an SSD by reading the sysfs block queue rotational flag.
>>
>> IMHO this policy is too inflexible. What if I have large array of slow SATA
>> disks and some fast SAS ones ?
>
> I'm hoping that this is just first cut, and future versions will have options.
> For now, it is totally unusable without a way of using mirrored SSD for
> hot data.
> Ideally, hot storage devices should be online selectable and changeable.
>
> --
> Tomasz Torcz 72->| 80->|
> xmpp:
zdzichubg@chrome.pl 72->| 80->|
>
>
