kos13

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Posts posted by kos13

  1. preserve file ownership on sync

    in Sync General Discussion

    Posted

    Can you please tell me more about use case and why it is important to you? I see too many issues with transferring file ownership in p2p environment.

    I'll give you few examples:

    - Linux machine doesn't have the same user in system, what Sync should do? If you will add the 3-rd Linux box, what should be uid for the file?

    - You have the uid but don't have permission to change it.

    - You changed uid on one Linux machine, should it be propagated to other?

    I understand how this should work if you own and manage two Linux boxes. In p2p environment, different OSes and different ownership of machines it is unclear to me how Sync should behave.

    I completely agree that for enterprise world this is must have feature, and we will do it.

  10. [answered] DHT Network

    in Sync General Discussion

    Posted

    There are few things:

    - You don't always know what external port is assigned, so when you report to DHT it will use your internal port;

    - DHT is slower than tracker, and we saw some models that drop the mapping

    - Tracker does help us to detect NAT type, so in future we could increase % of direct connections;

    - DHT traffic is not encrypted, so some companies (ISP) may block it.

    So using DHT is close to tracker, but tracker will give you better chances for direct connection.

  12. [Now Implemented!] Btsync As A Windows Service

    in Feature Requests

    Posted

    We got report from user, that he was able to start Sync as service on Windows Server 2008 R2 using following instructions.

    http://support.microsoft.com/kb/137890

    This is not generic case, but might help you.

    Instructions:

    1. Copy instsrv.exe & srvany.exe to C:\Program Files (x86)\BitTorrent Sync, you should get these files from Windows NT Resource Kit

    2. In Command Line from Administrator execute following:

    cd C:\Program Files (x86)\BitTorrent Sync

    instsrv BTSync “C:\Program Files (x86)\BitTorrent Sync\srvany.exe”

    regedit

    3. In regestry editor find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\BTSync

    Create key: Parameters leave key:blank

    Inside Parameters create new value (type REG_SZ): Application with value:

    C:\Program Files (x86)\BitTorrent Sync\BTSync.exe

    4. In application preferences make sure to unchek "Start application when Windows starts"

    5. Close BTSync

    6. From the Services applet in Control Panel find BTSync make sure that type is Automatic and inside

    "Log On" tab enter your login and password.

    7. Start BTSync service.

    Please let us know if this solution will work.

    Thanks to Ivan Nikitin. Original article in Russian http://ivannikitin.c...ittorrent-sync/

  15. Metacache & new user experiences.

    in Sync General Discussion

    Posted

    Sync right now can support up to a 1M files. However it will require significant memory for that. We understand how we could improve that but not there yet.

    Memory usage for 400k files might be in range of 1Gb = which is a lot. We are working on improvement.

    Please also note, that there is a virtual memory and real memory. Usually all memory tools shows you virtual memory.

  16. Why Would TCP Increase Speed?

    in Sync General Discussion

    Posted

    TCP is well optimized for each OS. There are a lot of kernel optimized things that is happening inside kernel. While UDP is simpler from OS perspective, Sync has to do a lot of uTP activity at user level. This will involve context switching, data copy from kernel to OS etc. This will add overhead especially on low end CPU like NAS.

  17. using Sync in China (PRC)

    in Sync General Discussion

    Posted

    Hi. I'm an American living in China (PRC). I'm wondering if the Chinese government, which regularly censors and interferes with internet traffic, may be stopping torrent file tracking. Could this be why the SyncApp isn't working here?

    Just to be clear, the app works fine on my local area network. When I tried to use it between my home and my work office, that's when it didn't work. I thought that my work office computer would use the secret to connect with the BitTorrent Inc. server and then the torrent tracking system would connect it to my computer at home. Isn't that what's supposed to happen?

    Would using a VPN help? If so, I assume both computers would have to have a VPN running, at the same time, and probably to a VPN server in the United States or Europe? The reason I haven't tested this idea is because I have only one VPN account which can only run on one computer at a time. To test this I would have to get a second account, but I thought I'd ask first before I went to the trouble.

    Thank you for any advice.

    Sync uses upd for internet transfers. So most likely upd is blocked somewhere on your route. As it sees UPD is not blocked by Great FW of China, it must be somewhere inside your network.

    You may also try to follow these steps - and we will give you better clue.

  22. Sync API wishlist

    in Developers

    Posted

    No idea the exact terms of how to do it (As thinking that far ahead would require me to be coding the thing), but, you'd connect to the tracker and ask for a node that is listening on your API key, the same way you do with secrets, just, a marker saying it's an API key and not a secret. Once it connects to a node, it's pretty much the same same as if it were a node (Downloading & uploading), however, it asks the node to do everything instead of it. Instead of downloading a file, modifying it, and then reuploading it, it sends a request to the node to modify it, and then the node just uploads it. Same with if you want to create a file, you ask the node to create it and then the node distributes it. Obviously because of this you can't hash files yourself, or search the file for regex terms/etc yourself, so, you'd have to get nodes to do it for you and reply back with the results in a simple TCP connection.

    And if this is implemented, what will be a use case for such functionality?

  24. Sync API wishlist

    in Developers

    Posted

    I just assumed that the API would be for remote modification of shares without having the full files downloaded (E.G. for my service to modify your shares without having your shares, so, I can't run my MD5 hashing software on a file I don't have), if I'm incorrect, then, it'd help to know how the API would be used (Which, I asked before but apparently you don't know yourself).

    Please, it would be very interesting. We never thought about such use case.

    EDIT:- Unless you're talking about launch arguments, which, I wouldn't really call an API. I'd simply call it a command-line interface.

    EDIT2:- Example:-

    Youtube API provides the length of the video, if I were to download said video I'd know the length, but, at that point I'd stop calling it an API and start simply calling it a downloader & metadata reader.

    EDIT3:- Or maybe you mean plugins for BTSync? I can understand why I wouldn't need the commands if it was simply a plugin, something that's run along side BTSync.

    API is so generic terms that different people might use in different context. Therefore we asked you what you want to see. This will give us better chance to develop something really usable.