Re: [PATCH 0/2] New zonefs file system

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

 



On 2019/12/16 18:42, Carlos Maiolino wrote:
> On Mon, Dec 16, 2019 at 10:36:00AM +0100, Carlos Maiolino wrote:
>> On Mon, Dec 16, 2019 at 09:18:23AM +0100, Enrico Weigelt, metux IT consult wrote:
>>> On 12.12.19 19:38, Damien Le Moal wrote:
>>>
>>> Hi,
>>>
>>>> zonefs is a very simple file system exposing each zone of a zoned block
>>>> device as a file. Unlike a regular file system with zoned block device
>>>> support (e.g. f2fs or the on-going btrfs effort), zonefs does not hide
>>>> the sequential write constraint of zoned block devices to the user.
>>>
>>> Just curious: what's the exact definition of "zoned" here ?
>>> Something like partitions ?
>>
>> Zones inside a SMR HDD.
>>
> 
> Btw, Zoned devices concept are not limited on HDDs only. I'm not sure now if the
> patchset itself also targets SMR devices or is more focused on Zoned SDDs, but
> well, the limitation where each zone can only be written sequentially still
> applies.

zonefs supports any block device that advertised itself as "zoned"
(blk_queue_is_zoned(q) is true) through the zoned block device
abstraction (block/blk-zoned.c). This includes all SMR HDDs (both SCSI
and ATA), null_blk devices with zoned mode enabled and DM-linear drives
built on top of zoned devices.

On the SSD front, NVMe Zoned Namespace standard is still a draft and
being worked on be the NVMe committee and no devices are available on
the market yet.

-- 
Damien Le Moal
Western Digital Research




[Index of Archives]     [XFS Filesystem Development (older mail)]     [Linux Filesystem Development]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux RAID]     [Linux SCSI]


  Powered by Linux