View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001514 | GNUnet | ARM service | public | 2009-11-16 01:10 | 2012-06-18 21:02 |
| Reporter | Christian Grothoff | Assigned To | Christian Grothoff | Due Date | |
| Priority | low | Severity | feature | Reproducibility | N/A |
| Status | closed | Resolution | won't fix | ||
| Summary | 0001514: ARM should be smarter about restarting processes due to configuration changes | ||||
| Description | ARM should monitor the current configuration file for changes (not just in timestamp but in content!). If a change is detected, ARM should restart those service processes that are impacted. For this, we need a way for ARM to learn which options a process depends on. This is not static information. We will say that a process depends on an option after it has accessed the option for the first time using the gnunet_configuration_lib API. Obviously this set of options could change during the lifetime of a process. Somehow, the process needs to communicate this information to ARM. | ||||
| Additional Information | I'm currently thinking of using a (temporary) file on disk where the process could write a bloom filter (!) with bits set for all of the options the process has accessed. Advantages: 1) Using a bloom filter would minimize IO / parsing. 2) The probabilistic nature is harmless in this context (extremely rare unnecessary re-starts if a configuration changed) 3) No need for ARM to listen on some port for notifications; in fact, if the configuration does not change, ARM never needs to even read the bloom filter files! 4) Can use bloom filter 'test' to quickly determine if the option was accessed previously -- and then avoid writing to disk again) | ||||
| Tags | No tags attached. | ||||
| - better tracking of which config changes actually need to cause process restarts by ARM. - handle gnunet-arm -k in combination with auto-start magic (what is the right thing here?) - discover dependencies between services | |
| I'm starting to think this is a bad idea --- very, very complicated to get right, and complicating ARM which is really undesirable. | |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2009-11-16 01:10 | Christian Grothoff | New Issue | |
| 2009-11-16 01:11 | Christian Grothoff | Assigned To | => safey |
| 2009-11-16 01:11 | Christian Grothoff | Status | new => assigned |
| 2011-09-15 12:20 | Christian Grothoff | Assigned To | safey => |
| 2011-09-15 12:20 | Christian Grothoff | Status | assigned => confirmed |
| 2011-11-04 10:14 | Christian Grothoff | Priority | normal => low |
| 2011-11-22 12:24 | Christian Grothoff | Note Added: 0004961 | |
| 2012-02-21 21:06 | Christian Grothoff | Target Version | => 0.9.5 |
| 2012-06-18 21:02 | Christian Grothoff | Note Added: 0006092 | |
| 2012-06-18 21:02 | Christian Grothoff | Assigned To | => Christian Grothoff |
| 2012-06-18 21:02 | Christian Grothoff | Status | confirmed => closed |
| 2012-06-18 21:02 | Christian Grothoff | Resolution | open => won't fix |
| 2012-06-18 21:02 | Christian Grothoff | Target Version | 0.9.5 => |