removing shares more quickly than one day

[tryb]

Hello,

Default Tahoe's file expiration time is 1 month. It is possible to set it for 1 day. I would like to have it at least 1 hour.

I found on server.py something like this:

expire_time = time.time() + 31*24*60*60

If I will change this to 60*60 would I have expiration time set to one hour?

Regards

[zooko]

When you say "at least 1 hour", I'm not sure what you mean. 1 month *is* at least 1 hour. Do you want it to be shorter or longer?

[tryb]

I'm sorry. Yes, I meant to say that I want it shorter. I want it to be maximum one hour. After this time removed files should be gone, so I can use the disk space for other files.

[davidsarah]

In the [storage] section of each storage server's tahoe.cfg, set

expire.enabled = true
expire.mode = age
expire.override_lease_duration = 3600s

This setting is documented in docs/garbage-collection.rst​, but the current documentation implies that no units shorter than a day are supported. Actually seconds are the default unit (or can be given as 's').

However, there is another obstacle to removing shares quickly, which is that the lease crawler runs no more than every 12 hours (src/allmydata/storage/expirer.py#L49​). You can modify that line to make it run more often.

When the leasedb changes are integrated (currently planned for Tahoe-LAFS v1.11.0 v1.12.0), we can probably check for expired leases much more often (or potentially calculate what the next lease might expire and wait until exactly that time to re-check it). See #1833 for that.

[daira]

Hmm, the conclusion here is basically "won't fix until #1833 is fixed". So I'm marking this as a duplicate of #1833.