Valid helper makes "Connected to Q of R" irrelevant for upload success #2117

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tahoe-lafs · 2013-11-27T14:41:51Z

Faux commented

2013-11-27 14:41:51 +00:00

When a machine has a valid helper configured and connected, the number of storage nodes it is directly connected to becomes far less interesting.

For example:

Machine A is sitting on some awful network (and hence can't connect to nearly anything), but I've made sure it can access the helper (H).
Machine H, the helper, can talk to most of the machines in the storage cluster.
Machine A's status page reports "Connected to 1 of 9 storage nodes".
Machine H's status page reports "Connected to 8 of 9 storage nodes".

From looking at A's status page, it's impossible(?) to know that uploads (at 3-7-10) will succeed.

It would be nice if this was clearer, perhaps by reporting the helper's status?

When a machine has a valid helper configured and connected, the number of storage nodes it is directly connected to becomes far less interesting. For example: * Machine A is sitting on some awful network (and hence can't connect to nearly anything), but I've made sure it can access the helper (H). * Machine H, the helper, can talk to most of the machines in the storage cluster. * Machine A's status page reports "Connected to 1 of 9 storage nodes". * Machine H's status page reports "Connected to 8 of 9 storage nodes". From looking at A's status page, it's impossible(?) to know that uploads (at 3-7-10) will succeed. It would be nice if this was clearer, perhaps by reporting the helper's status?

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tahoe-lafs added this to the undecided milestone 2013-11-27 14:41:51 +00:00

daira commented

2013-11-28 21:58:45 +00:00

Note that the helper isn't used in all cases, only for immutable uploads (#268, #283). I agree that it would be useful to show the helper's connected-server-count as well though.

We would probably need to add chk_upload_helper.connected_server_count to the [helper's stats result]source:src/allmydata/immutable/offloaded.py#L557.

Note that the helper isn't used in all cases, only for immutable uploads (#268, #283). I agree that it would be useful to show the helper's connected-server-count as well though. We would probably need to add `chk_upload_helper.connected_server_count` to the [helper's stats result]source:src/allmydata/immutable/offloaded.py#L557.

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