Slow Resilio Sync between two Docker containers on same host












9















I'm testing out Resilio (formerly BitTorrent) Sync using two docker containers on the same host, and I've noticed that syncing files is very slow when they are added via bind mounts.



First Resilio container:



docker run  -d --name resilio1 -p 81:8888 -p 55555:55555 -v /c/Users/Test/resilio/resilio1/config:/mnt/sync -v /c/Users/Test/resilio/resilio1/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


Second Resilio container (I've updated the configuration to listen on port 55556 to avoid a conflict with resilio1):



docker run  -d --name resilio2 -p 82:8888 -p 55556:55556 -v /c/Users/Test/resilio/resilio2/config:/mnt/sync -v /c/Users/Test/resilio/resilio2/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


It takes about 10 minutes for even small files to sync when they are added to the host's directories that are bind mounted into the containers.



Conversely, if I docker exec into the containers and create files or folders the syncing happens immediately.



Is there something I'm missing here?










share|improve this question

























  • If I remember correctly, BitTorrent Sync cannot always rely on file system events for synchronization, therefore it scans the file system regularly (defaults to 10 minutes, maybe?) to detect new and changed files. I don't have the time to research this, but hopefully my recollection may help you resolve this. Perhaps file system events are not available or triggered correctly?

    – Jochem Kuijpers
    Oct 31 '18 at 11:45


















9















I'm testing out Resilio (formerly BitTorrent) Sync using two docker containers on the same host, and I've noticed that syncing files is very slow when they are added via bind mounts.



First Resilio container:



docker run  -d --name resilio1 -p 81:8888 -p 55555:55555 -v /c/Users/Test/resilio/resilio1/config:/mnt/sync -v /c/Users/Test/resilio/resilio1/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


Second Resilio container (I've updated the configuration to listen on port 55556 to avoid a conflict with resilio1):



docker run  -d --name resilio2 -p 82:8888 -p 55556:55556 -v /c/Users/Test/resilio/resilio2/config:/mnt/sync -v /c/Users/Test/resilio/resilio2/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


It takes about 10 minutes for even small files to sync when they are added to the host's directories that are bind mounted into the containers.



Conversely, if I docker exec into the containers and create files or folders the syncing happens immediately.



Is there something I'm missing here?










share|improve this question

























  • If I remember correctly, BitTorrent Sync cannot always rely on file system events for synchronization, therefore it scans the file system regularly (defaults to 10 minutes, maybe?) to detect new and changed files. I don't have the time to research this, but hopefully my recollection may help you resolve this. Perhaps file system events are not available or triggered correctly?

    – Jochem Kuijpers
    Oct 31 '18 at 11:45
















9












9








9


2






I'm testing out Resilio (formerly BitTorrent) Sync using two docker containers on the same host, and I've noticed that syncing files is very slow when they are added via bind mounts.



First Resilio container:



docker run  -d --name resilio1 -p 81:8888 -p 55555:55555 -v /c/Users/Test/resilio/resilio1/config:/mnt/sync -v /c/Users/Test/resilio/resilio1/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


Second Resilio container (I've updated the configuration to listen on port 55556 to avoid a conflict with resilio1):



docker run  -d --name resilio2 -p 82:8888 -p 55556:55556 -v /c/Users/Test/resilio/resilio2/config:/mnt/sync -v /c/Users/Test/resilio/resilio2/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


It takes about 10 minutes for even small files to sync when they are added to the host's directories that are bind mounted into the containers.



Conversely, if I docker exec into the containers and create files or folders the syncing happens immediately.



Is there something I'm missing here?










share|improve this question
















I'm testing out Resilio (formerly BitTorrent) Sync using two docker containers on the same host, and I've noticed that syncing files is very slow when they are added via bind mounts.



First Resilio container:



docker run  -d --name resilio1 -p 81:8888 -p 55555:55555 -v /c/Users/Test/resilio/resilio1/config:/mnt/sync -v /c/Users/Test/resilio/resilio1/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


Second Resilio container (I've updated the configuration to listen on port 55556 to avoid a conflict with resilio1):



docker run  -d --name resilio2 -p 82:8888 -p 55556:55556 -v /c/Users/Test/resilio/resilio2/config:/mnt/sync -v /c/Users/Test/resilio/resilio2/data:/mnt/mounted_folders/data --restart on-failure resilio/sync


It takes about 10 minutes for even small files to sync when they are added to the host's directories that are bind mounted into the containers.



Conversely, if I docker exec into the containers and create files or folders the syncing happens immediately.



Is there something I'm missing here?







docker bittorrent-sync






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 20 '18 at 2:50







atm

















asked Oct 21 '18 at 4:11









atmatm

606817




606817













  • If I remember correctly, BitTorrent Sync cannot always rely on file system events for synchronization, therefore it scans the file system regularly (defaults to 10 minutes, maybe?) to detect new and changed files. I don't have the time to research this, but hopefully my recollection may help you resolve this. Perhaps file system events are not available or triggered correctly?

    – Jochem Kuijpers
    Oct 31 '18 at 11:45





















  • If I remember correctly, BitTorrent Sync cannot always rely on file system events for synchronization, therefore it scans the file system regularly (defaults to 10 minutes, maybe?) to detect new and changed files. I don't have the time to research this, but hopefully my recollection may help you resolve this. Perhaps file system events are not available or triggered correctly?

    – Jochem Kuijpers
    Oct 31 '18 at 11:45



















If I remember correctly, BitTorrent Sync cannot always rely on file system events for synchronization, therefore it scans the file system regularly (defaults to 10 minutes, maybe?) to detect new and changed files. I don't have the time to research this, but hopefully my recollection may help you resolve this. Perhaps file system events are not available or triggered correctly?

– Jochem Kuijpers
Oct 31 '18 at 11:45







If I remember correctly, BitTorrent Sync cannot always rely on file system events for synchronization, therefore it scans the file system regularly (defaults to 10 minutes, maybe?) to detect new and changed files. I don't have the time to research this, but hopefully my recollection may help you resolve this. Perhaps file system events are not available or triggered correctly?

– Jochem Kuijpers
Oct 31 '18 at 11:45














1 Answer
1






active

oldest

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Resilio Sync uses two mechanisms to track changes in a file system:




  • File system notifications Resilio Sync subscribes to (to obtain info about changes in a file system immediately). These notifications are just an OS kernel mechanism, for example Inotify API is used on Linux.

  • Periodic re-scan of all folders added in Sync (occurs every 10 mins by default and can be configured in settings)


As you may know Docker on Windows works using a Linux VM and relies on SMB/CIFS support in Linux kernel. As Jochem Kuijpers mentioned the issue is related to a file system notifications which don't work properly in case of Windows and mounted volumes and this is a known issue.



The workaround is to use some 3rd party tool that tracks changes in mounted windows volumes and notifies Docker containers about it.



You can use docker-windows-volume-watcher for example. Install is pretty simple (the script needs to be installed on Windows):



pip install docker-windows-volume-watcher


Usage is simple too:



docker-volume-watcher <container_name> C:pathtomounteddirectory


As the article says:




The script will inspect all running containers and start notifying
containers about changes in mounted directories. The script will also
listen container start/stop events and update the list of watched
directories.







share|improve this answer

























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    Resilio Sync uses two mechanisms to track changes in a file system:




    • File system notifications Resilio Sync subscribes to (to obtain info about changes in a file system immediately). These notifications are just an OS kernel mechanism, for example Inotify API is used on Linux.

    • Periodic re-scan of all folders added in Sync (occurs every 10 mins by default and can be configured in settings)


    As you may know Docker on Windows works using a Linux VM and relies on SMB/CIFS support in Linux kernel. As Jochem Kuijpers mentioned the issue is related to a file system notifications which don't work properly in case of Windows and mounted volumes and this is a known issue.



    The workaround is to use some 3rd party tool that tracks changes in mounted windows volumes and notifies Docker containers about it.



    You can use docker-windows-volume-watcher for example. Install is pretty simple (the script needs to be installed on Windows):



    pip install docker-windows-volume-watcher


    Usage is simple too:



    docker-volume-watcher <container_name> C:pathtomounteddirectory


    As the article says:




    The script will inspect all running containers and start notifying
    containers about changes in mounted directories. The script will also
    listen container start/stop events and update the list of watched
    directories.







    share|improve this answer






























      2














      Resilio Sync uses two mechanisms to track changes in a file system:




      • File system notifications Resilio Sync subscribes to (to obtain info about changes in a file system immediately). These notifications are just an OS kernel mechanism, for example Inotify API is used on Linux.

      • Periodic re-scan of all folders added in Sync (occurs every 10 mins by default and can be configured in settings)


      As you may know Docker on Windows works using a Linux VM and relies on SMB/CIFS support in Linux kernel. As Jochem Kuijpers mentioned the issue is related to a file system notifications which don't work properly in case of Windows and mounted volumes and this is a known issue.



      The workaround is to use some 3rd party tool that tracks changes in mounted windows volumes and notifies Docker containers about it.



      You can use docker-windows-volume-watcher for example. Install is pretty simple (the script needs to be installed on Windows):



      pip install docker-windows-volume-watcher


      Usage is simple too:



      docker-volume-watcher <container_name> C:pathtomounteddirectory


      As the article says:




      The script will inspect all running containers and start notifying
      containers about changes in mounted directories. The script will also
      listen container start/stop events and update the list of watched
      directories.







      share|improve this answer




























        2












        2








        2







        Resilio Sync uses two mechanisms to track changes in a file system:




        • File system notifications Resilio Sync subscribes to (to obtain info about changes in a file system immediately). These notifications are just an OS kernel mechanism, for example Inotify API is used on Linux.

        • Periodic re-scan of all folders added in Sync (occurs every 10 mins by default and can be configured in settings)


        As you may know Docker on Windows works using a Linux VM and relies on SMB/CIFS support in Linux kernel. As Jochem Kuijpers mentioned the issue is related to a file system notifications which don't work properly in case of Windows and mounted volumes and this is a known issue.



        The workaround is to use some 3rd party tool that tracks changes in mounted windows volumes and notifies Docker containers about it.



        You can use docker-windows-volume-watcher for example. Install is pretty simple (the script needs to be installed on Windows):



        pip install docker-windows-volume-watcher


        Usage is simple too:



        docker-volume-watcher <container_name> C:pathtomounteddirectory


        As the article says:




        The script will inspect all running containers and start notifying
        containers about changes in mounted directories. The script will also
        listen container start/stop events and update the list of watched
        directories.







        share|improve this answer















        Resilio Sync uses two mechanisms to track changes in a file system:




        • File system notifications Resilio Sync subscribes to (to obtain info about changes in a file system immediately). These notifications are just an OS kernel mechanism, for example Inotify API is used on Linux.

        • Periodic re-scan of all folders added in Sync (occurs every 10 mins by default and can be configured in settings)


        As you may know Docker on Windows works using a Linux VM and relies on SMB/CIFS support in Linux kernel. As Jochem Kuijpers mentioned the issue is related to a file system notifications which don't work properly in case of Windows and mounted volumes and this is a known issue.



        The workaround is to use some 3rd party tool that tracks changes in mounted windows volumes and notifies Docker containers about it.



        You can use docker-windows-volume-watcher for example. Install is pretty simple (the script needs to be installed on Windows):



        pip install docker-windows-volume-watcher


        Usage is simple too:



        docker-volume-watcher <container_name> C:pathtomounteddirectory


        As the article says:




        The script will inspect all running containers and start notifying
        containers about changes in mounted directories. The script will also
        listen container start/stop events and update the list of watched
        directories.








        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 13 '18 at 8:33

























        answered Nov 1 '18 at 16:08









        Artsiom PraneuskiArtsiom Praneuski

        1,047412




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