similar to: Why files goes to hot tier and cold tier at same time

Hi, The actual data will be in the hot tier only till demotion. The file that you see on the cold tier is just a linkto file of the file on the hot tier. These linkto file are necessary for the internal working of the tier. On Mon, Mar 5, 2018 at 1:16 PM, Sherin George <allmyforums at outlook.in> wrote: > Hi Guys > > Got a quick question regarding hot tier and cold tier. > I

I've recently enabled an SSD backed 2 TB hot tier on my 150 TB 2 server / 3 bricks per server distributed replicated volume. I'm seeing IO get blocked across all client FUSE threads for 10 to 15 seconds while the promotion daemon runs. I see the 'glustertierpro' thread jump to 99% CPU usage on both boxes when these delays occur and they happen every 25 minutes (my

Hi, Can you send the volume info, and volume status output and the tier logs. And I need to know the size of the files that are being stored. On Tue, Jan 9, 2018 at 9:51 PM, Tom Fite <tomfite at gmail.com> wrote: > I've recently enabled an SSD backed 2 TB hot tier on my 150 TB 2 server / 3 > bricks per server distributed replicated volume. > > I'm seeing IO get blocked

Hi Tom, The volume info doesn't show the hot bricks. I think you have took the volume info output before attaching the hot tier. Can you send the volume info of the current setup where you see this issue. The logs you sent are from a later point in time. The issue is hit earlier than the logs what is available in the log. I need the logs from an earlier time. And along with the entire tier

The sizes of the files are extremely varied, there are millions of small (<1 MB) files and thousands of files larger than 1 GB. Attached is the tier log for gluster1 and gluster2. These are full of "demotion failed" messages, which is also shown in the status: [root at pod-sjc1-gluster1 gv0]# gluster volume tier gv0 status Node Promoted files Demoted files

Thanks for the info, Hari. Sorry about the bad gluster volume info, I grabbed that from a file not realizing it was out of date. Here's a current configuration showing the active hot tier: [root at pod-sjc1-gluster1 ~]# gluster volume info Volume Name: gv0 Type: Tier Volume ID: d490a9ec-f9c8-4f10-a7f3-e1b6d3ced196 Status: Started Snapshot Count: 13 Number of Bricks: 8 Transport-type: tcp Hot

I should add that additional testing has shown that only accessing files is held up, IO is not interrupted for existing transfers. I think this points to the heat metadata in the sqlite DB for the tier, is it possible that a table is temporarily locked while the promotion daemon runs so the calls to update the access count on files are blocked? On Wed, Jan 10, 2018 at 10:17 AM, Tom Fite

Hi Guys, I have a gluster volume with the following configuration. ~~~~~~~~~~~~~~~~~~~~~ Number of Bricks: 9 Transport-type: tcp Hot Tier : Hot Tier Type : Replicate Number of Bricks: 1 x 3 = 3 Cold Tier: Cold Tier Type : Distributed-Replicate Number of Bricks: 2 x 3 = 6 performance.flush-behind: on performance.cache-max-file-size: 128MB performance.cache-size: 25GB

http://lists.gluster.org/pipermail/gluster-users/2017-July/031788.html http://lists.gluster.org/pipermail/gluster-users/2017-September/032385.html also try disperse.eager-lock off On Tue, Mar 6, 2018 at 7:40 AM, Sherin George <allmyforums at outlook.in> wrote: > Hi Guys, > > I have a gluster volume with the following configuration. > ~~~~~~~~~~~~~~~~~~~~~ > Number of Bricks:

Hi, If it was just reads then the tier daemon won't migrate the files to hot tier. If you create a file or write to a file that file will be made available on the hot tier. On Mon, Jul 31, 2017 at 11:06 AM, Nithya Balachandran <nbalacha at redhat.com> wrote: > Milind and Hari, > > Can you please take a look at this? > > Thanks, > Nithya > > On 31 July 2017 at

For the tier daemon to migrate the files for read, few performance translators have to be turned off. By default the performance quick-read and io-cache are turned on. You can turn them off so that the files will be migrated for read. On Mon, Jul 31, 2017 at 11:34 AM, Hari Gowtham <hgowtham at redhat.com> wrote: > Hi, > > If it was just reads then the tier daemon won't migrate

Hi, Before you try turning off the perf translators can you send us the following, So we will make sure that the other things haven't gone wrong. can you send us the log files for tier (would be better if you attach other logs too), the version of gluster you are using, the client, and the output for: gluster v info gluster v get v1 performance.io-cache gluster v get v1

Hi, You have missed the log files. Can you attach them? On Mon, Jul 31, 2017 at 7:22 PM, Dmitri Chebotarov <4dimach at gmail.com> wrote: > Hi > > At this point I already detached Hot Tier volume to run rebalance. Many > volume settings only take effect for the new data (or rebalance), so I > thought may this was the case with Hot Tier as well. Once rebalance > finishes,

Hi At this point I already detached Hot Tier volume to run rebalance. Many volume settings only take effect for the new data (or rebalance), so I thought may this was the case with Hot Tier as well. Once rebalance finishes, I'll re-attache hot tier. cluster.write-freq-threshold and cluster.read-freq-threshold control number of times data is read/write before it moved to hot tier. In my case

Does anyone have any ideas about how to fix, or to work-around the following issue? Thanks! Bug 1549714 - On sharded tiered volume, only first shard of new file goes on hot tier. https://bugzilla.redhat.com/show_bug.cgi?id=1549714 On sharded tiered volume, only first shard of new file goes on hot tier. On a sharded tiered volume, only the first shard of a new file goes on the hot tier, the rest

Milind and Hari, Can you please take a look at this? Thanks, Nithya On 31 July 2017 at 05:12, Dmitri Chebotarov <4dimach at gmail.com> wrote: > Hi > > I'm looking for an advise on hot tier feature - how can I tell if the hot > tier is working? > > I've attached replicated-distributed hot tier to an EC volume. > Yet, I don't think it's working, at

Hi I'm looking for an advise on hot tier feature - how can I tell if the hot tier is working? I've attached replicated-distributed hot tier to an EC volume. Yet, I don't think it's working, at least I don't see any files directly on the bricks (only folder structure). 'Status' command has all 0s and 'In progress' for all servers. ~]# gluster volume tier home

Milind - Thank you for the response.. >> What are the high and low watermarks for the tier set at ? # gluster volume get <vol> cluster.watermark-hi Option Value ------ ----- cluster.watermark-hi 90 # gluster volume get <vol> cluster.watermark-low Option

Herb, What are the high and low watermarks for the tier set at ? # gluster volume get <vol> cluster.watermark-hi # gluster volume get <vol> cluster.watermark-low What is the size of the file that failed to migrate as per the following tierd log: [2017-10-19 17:52:07.519614] I [MSGID: 109038] [tier.c:1169:tier_migrate_using_query_file] 0-<vol>-tier-dht: Promotion failed for

Herb, I'm trying to weed out issues here. So, I can see quota turned *on* and would like you to check the quota settings and test to see system behavior *if quota is turned off*. Although the file size that failed migration was 29K, I'm being a bit paranoid while weeding out issues. Are you still facing tiering errors ? I can see your response to Alex with the disk space consumption and