[Bug 1272252] Re: qemu-img ftp/http convert

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1272252

Title:
  qemu-img ftp/http convert

Status in QEMU:
  Expired

Bug description:
  Converting images with ftp or http as source could be done a lot
  faster. The way it works now (qemu 1.7.50) is significantly slower
  than the optimal way.

  FTP - how it works now
  1. Connect and login to ftp-server. Ask for size of file.
  2. Get a chunk of data using rest+retr
  3. Goto step 1 again in a loop until all data is retrieved

  FTP - better solution
  1. Connect and login to ftp-server. Dont ask for size of file.
  2. Retrieve all remaining data
  3. Goto step 1 again if disconnected/io error (max NN errors etc)

  
  Http - how it works now
  1. Connect to webserver and ask for size of file / http HEAD.
  2. Get a chunk of data using http Range.
  3. Goto step 1 again in a loop until all data is retrieved.

  Http - better solution
  1. Connect to webserver.
  2. Retrieve all remaining data.
  3. Goto step 1 again if disconnected/io error (max NN errors).

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