Changes between Initial Version and Version 4 of Ticket #1835

Timestamp:

2014-02-28T13:38:56Z (11 years ago)

Author:

daira

Comment:

Replying to davidsarah:

Currently the server always does a list query to the backend. The leasedb allows us to skip that list query in the case where the share is present in the DB. If the leasedb is not authoritative, then we still do the query in the case where the share is not present in the DB, but this only prevents us from improving the latency of reporting that a server does not have a share. So, given that the downloader uses the first k servers to respond to a DYHB, it does not affect the performance of a (successful) download.

See 287#comment:29 for more information about what the downloader does. I think it may wait for the 10 second timeout if there are servers that haven't responded, rather than proceeding immediately after the first k servers have responded -- in which case, my above argument isn't valid unless that is fixed.