Always update to latest code available before reporting a problem

Nicolas.

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{
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                "retryable": true,
                "time": "2020-11-16T21:55:08.319Z",
                "name": "NetworkingError",
                "stack": "Error: write EPIPE\n    at WriteWrap.onWriteComplete [as oncomplete] (internal/stream_base_commons.js:92:16)"
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      "id": "1605564045510",
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}

also delta backup have the same problem

Since you're building from the sources, would you mind running a special test branch for me in a few days?

Right now, my working copy is tied up with something else that I would like to finish first.

Thanks,
Nicolas.

If it helps, I'm reasonably certain that I was able to backup and upload similarly sized VMs previously without memory issues, before the 50GB+ chunking changes.

I assume all kinds of VMs can be backed up in delta. I don't have any connection between the VM type and the remote type.

Yes, Full Backup, target is S3, both with or without compression.

(Side note: I didn't realize that Delta Backups were possible with S3. This could be significant in storage space. But I also assume that this is *nix VMs only?)

Just did, reduced to 2GB RAM. The pfSense Backup was about the same, except the post-backup idle state was around 900MB usage.

The 2nd VM bombed out with an "Interrupted" transfer status (similar to a few posts above).

OK, DL'ed/Registered XOA, bumped it to 6 GB just in case (VM only, not the node process).

Updated to XOA latest channel, 5.51.1 (5.68.0/5.72.0). (p.s. thanks for the config backup/restore function. Needed to restart the VM or xo-server, but retained my S3 remote settings.)

First is a pfSense VM, ~600 MB after zstd. The initial 5+GB usage is VM bootup.

Next is the same VM that I used for the previous tests. ~7GB after ztsd. The job started around 9:30, where the initial ramp-up occurred (during snapshot and transfer start). Then it jumped further to 5+ GB.

That's about as clear as I can get in the 10 minute window. It finished, dropped down to 3.5GB, and then eventually back to 1.4GB.

Also @klou could you test it on XOA latest please?

Memory usage is relatively stable around 1.4 GB (most of this morning, with --max-old-space-size=2560) , balloons during a S3 backup job, and then goes back down to 1.4 GB when transfer is complete.

edit: The above was a backup without compression.

Again, thanks for the help with this.

Whether or not the node process is actually using that much (I've been reading that by default, it maxes around 1.4 GB, but I just increased that with --max-old-space-size=2560), larger S3 backups/transfers are still only successful if I increase XO VM memory to > 5 GB.

A recent backup run showed overall usage ballooned to 5.5+ GB during the backup, and then went back to ~1.4GB afterwards.

I don't know if this is intended behavior or if you want to finetune it later, but leaving the VM at 6 GB works for me.

However, the xo-server process doesn't obviously crash anymore after I increased VM memory from 3GB to 4GB. I see that XOA defaults to 2GB -- what's recommended at this point (~30 VMs, 3 hosts)?

With both 3GB or 4GB, top shows the node process taking ~90% of memory during a transfer. I wonder if it's buffering the entire upload chunk in memory?

With that in mind, I increased to 5.5GB, since the largest upload chunk should be 5GB. And it completed the upload successfully, though still using 90% memory throughout the process. This ended up being a 6GB upload, after zstd.

Because you are using it from sources, I can't be sure about the issue origin, but here I have the feeling you got out of memory and Node process crashed.

Oct 14 14:42:00 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:43:00 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:44:00 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:44:16 chaz xo-server[101910]: 2020-10-14T21:44:16.127Z xo:main INFO + WebSocket connection (::ffff:10.0.0.15)
Oct 14 14:44:59 chaz xo-server[101910]: 2020-10-14T21:44:59.644Z xo:xapi DEBUG Snapshotting VM Calculon as [XO Backup Calculon-Onetime] Calculon
Oct 14 14:45:00 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:45:02 chaz xo-server[101910]: 2020-10-14T21:45:02.694Z xo:xapi DEBUG Deleting VM [XO Backup Calculon-Onetime] Calculon
Oct 14 14:45:02 chaz xo-server[101910]: 2020-10-14T21:45:02.916Z xo:xapi DEBUG Deleting VDI OpaqueRef:67b407aa-14a4-4452-9d7c-852b645bbd90
Oct 14 14:46:01 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:46:59 chaz xo-server[101910]: _watchEvents TimeoutError: operation timed out
Oct 14 14:46:59 chaz xo-server[101910]:     at Promise.call (/opt/xen-orchestra/node_modules/promise-toolbox/timeout.js:13:16)
Oct 14 14:46:59 chaz xo-server[101910]:     at Xapi._call (/opt/xen-orchestra/packages/xen-api/src/index.js:666:37)
Oct 14 14:46:59 chaz xo-server[101910]:     at Xapi._watchEvents (/opt/xen-orchestra/packages/xen-api/src/index.js:1012:31)
Oct 14 14:46:59 chaz xo-server[101910]:     at runMicrotasks (<anonymous>)
Oct 14 14:46:59 chaz xo-server[101910]:     at processTicksAndRejections (internal/process/task_queues.js:97:5) {
Oct 14 14:46:59 chaz xo-server[101910]:   call: {
Oct 14 14:46:59 chaz xo-server[101910]:     method: 'event.from',
Oct 14 14:46:59 chaz xo-server[101910]:     params: [ [Array], '00000000000012051192,00000000000011907676', 60.1 ]
Oct 14 14:46:59 chaz xo-server[101910]:   }
Oct 14 14:46:59 chaz xo-server[101910]: }
Oct 14 14:47:00 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:48:05 chaz xo-server[101910]: [load-balancer]Execute plans!
Oct 14 14:48:06 chaz xo-server[101910]: terminate called after throwing an instance of 'std::bad_alloc'
Oct 14 14:48:06 chaz xo-server[101910]:   what():  std::bad_alloc
Oct 14 14:48:06 chaz systemd[1]: xo-server.service: Main process exited, code=killed, status=6/ABRT
Oct 14 14:48:06 chaz systemd[1]: xo-server.service: Failed with result 'signal'.
Oct 14 14:48:07 chaz systemd[1]: xo-server.service: Service RestartSec=100ms expired, scheduling restart.
Oct 14 14:48:07 chaz systemd[1]: xo-server.service: Scheduled restart job, restart counter is at 1.
Oct 14 14:48:07 chaz systemd[1]: Stopped XO Server.

Transfer (Interrupted) started at 14:45:03.

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  "id": "1602711899558",
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        {
          "id": "1602711902294",
          "message": "add metadata to snapshot",
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          "status": "success",
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        {
          "id": "1602711903334",
          "message": "waiting for uptodate snapshot record",
          "start": 1602711903334,
          "status": "success",
          "end": 1602711903545
        },
        {
          "id": "1602711903548",
          "message": "start VM export",
          "start": 1602711903548,
          "status": "success",
          "end": 1602711903571
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        {
          "data": {
            "id": "8f721d6a-0d67-4c67-a860-e648bed3a458",
            "type": "remote"
          },
          "id": "1602711903573",
          "message": "export",
          "start": 1602711903573,
          "status": "interrupted",
          "tasks": [
            {
              "id": "1602711905594",
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              "start": 1602711905594,
              "status": "interrupted"
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}