Re: parallel-readdir prevents directories and files listing - Bug 1670382

[Amar Tumballi Suryanarayan <atumball@xxxxxxxxxx>]

On Mon, Apr 29, 2019 at 3:56 PM João Baúto <joao.bauto@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

Hi,

I have an 8 brick distributed volume where Windows and Linux clients mount the volume via samba and headless compute servers using gluster native fuse. With parallel-readdir on, if a Windows client creates a new folder, the folder is indeed created but invisible to the Windows client. Accessing the same samba share in a Linux client, the folder is again visible and with normal behavior. The same folder is also visible when mounting via gluster native fuse.

The Windows client can list existing directories and rename them while, for files, everything seems to be working fine.

Gluster servers: CentOS 7.5 with Gluster 5.3 and Samba 4.8.3-4.el7.0.1 from @fasttrack

Clients tested: Windows 10, Ubuntu 18.10, CentOS 7.5

https://bugzilla.redhat.com/show_bug.cgi?id=1670382

Thanks for the bug report. Will look into this, and get back.

Last I knew, we recommended to avoid fuse and samba shares on same volume (Mainly as we couldn't spend a lot of effort on testing the configuration). Anyways, we would treat the behavior as bug for sure. One possible path looking at below volume info is to disable 'stat-prefetch' option and see if it helps. Next option I would try is to disable readdir-ahead.

Regards,

Amar

 

Volume Name: tank

Type: Distribute

Volume ID: 9582685f-07fa-41fd-b9fc-ebab3a6989cf

Status: Started

Snapshot Count: 0

Number of Bricks: 8

Transport-type: tcp

Bricks:

Brick1: swp-gluster-01:/tank/volume1/brick

Brick2: swp-gluster-02:/tank/volume1/brick

Brick3: swp-gluster-03:/tank/volume1/brick

Brick4: swp-gluster-04:/tank/volume1/brick

Brick5: swp-gluster-01:/tank/volume2/brick

Brick6: swp-gluster-02:/tank/volume2/brick

Brick7: swp-gluster-03:/tank/volume2/brick

Brick8: swp-gluster-04:/tank/volume2/brick

Options Reconfigured:

performance.parallel-readdir: on

performance.readdir-ahead: on

performance.cache-invalidation: on

performance.md-cache-timeout: 600

storage.batch-fsync-delay-usec: 0

performance.write-behind-window-size: 32MB

performance.stat-prefetch: on

performance.read-ahead: on

performance.read-ahead-page-count: 16

performance.rda-request-size: 131072

performance.quick-read: on

performance.open-behind: on

performance.nl-cache-timeout: 600

performance.nl-cache: on

performance.io-thread-count: 64

performance.io-cache: off

performance.flush-behind: on

performance.client-io-threads: off

performance.write-behind: off

performance.cache-samba-metadata: on

network.inode-lru-limit: 0

features.cache-invalidation-timeout: 600

features.cache-invalidation: on

cluster.readdir-optimize: on

cluster.lookup-optimize: on

client.event-threads: 4

server.event-threads: 16

features.quota-deem-statfs: on

nfs.disable: on

features.quota: on

features.inode-quota: on

cluster.enable-shared-storage: disable

Cheers,

João Baúto

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--

Amar Tumballi (amarts)

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