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46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
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$Id: FAQ.Bandwidth.txt,v 1.2 2021/04/19 11:46:47 gilles Exp gilles $
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This documentation is also available online at
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https://imapsync.lamiral.info/FAQ.d/
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https://imapsync.lamiral.info/FAQ.d/FAQ.Bandwidth.txt
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=======================================================================
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Imapsync bandwidth used
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=======================================================================
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Questions answered in this FAQ are:
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Q. What is the bandwidth used by imapsync?
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Now the questions again with their answers.
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=======================================================================
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Q. What is the bandwidth used by imapsync?
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R. From the host where imapsync runs, it opens two imap connections,
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one with the source account at host1, one with the destination
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account at host2.
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So, the global bandwidth used is twice the volume of the source
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account, one volume to download the messages from host1,
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one volume to upload those messages to host2.
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If the host2 is already filled with the messages, imapsync doesn't
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transfer them and then the volume transferred is small, this volume
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is just the IMAP commands needed to identify the messages on both sides.
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There is no local cache of the email messages, except when the
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message is very big, it is temporarily saved locally.
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The biggest message seen so far on online /X is 3.08 GiB
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while the biggest message transferred is 1.51 GiB so
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I suspect a bug here. Drop me a note if you encounter the same
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issue, I'll then dig into it, ie, I'll create a 2 or 3 GiB message
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and play with it :-)
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=======================================================================
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=======================================================================
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