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Diffstat (limited to 'doc/design/assistant/blog/day_61__network_connection_detection.mdwn')
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diff --git a/doc/design/assistant/blog/day_61__network_connection_detection.mdwn b/doc/design/assistant/blog/day_61__network_connection_detection.mdwn new file mode 100644 index 000000000..8ab40f516 --- /dev/null +++ b/doc/design/assistant/blog/day_61__network_connection_detection.mdwn @@ -0,0 +1,36 @@ +Today, added a thread that deals with recovering when there's been a loss +of network connectivity. When the network's down, the normal immediate +syncing of changes of course doesn't work. So this thread detects when the +network comes back up, and does a pull+push to network remotes, and +triggers scanning for file content that needs to be transferred. + +I used dbus again, to detect events generated by both network-manager and +wicd when they've sucessfully brought an interface up. Or, if they're not +available, it polls every 30 minutes. + +When the network comes up, in addition to the git pull+push, it also +currently does a full scan of the repo to find files whose contents +need to be transferred to get fully back into sync. + +I think it'll be ok for some git pulls and pushes to happen when +moving to a new network, or resuming a laptop (or every 30 minutes when +resorting to polling). But the transfer scan is currently really too heavy +to be appropriate to do every time in those situations. I have an idea for +avoiding that scan when the remote's git-annex branch has not changed. But +I need to refine it, to handle cases like this: + +1. a new remote is added +2. file contents start being transferred to (or from it) +3. the network is taken down +4. all the queued transfers fail +5. the network comes back up +6. the transfer scan needs to know the remote was not all in sync + before #3, and so should do a full scan despite the git-annex branch + not having changed + +--- + +Doubled the ram in my netbook, which I use for all development. Yesod needs +rather a lot of ram to compile and link, and this should make me quite a +lot more productive. I was struggling with OOM killing bits of chromium +during my last week of development. |