Silo Archiving
Configuration
- Total size of activeDb is limited by config attribute
active-size
(default: 20 TB). - Total size of archiveDb is limited by config attribute
archive-size
(default: 20 TB).
Control Flow
Every 2.5 minutes, LCE will:
-
Read in the results of the last-executed action, from LCE status database.
-
Choose the next action to take based on the last-executed action.
-
Perform the next action and store results in LCE status database.
Storing the state in this manner has the following advantages:
-
simplicity (no separate logic to handle reloads/restarts is needed)
-
transparency (to see exactly where the archival algorithm is, just query the LCE status database.)
-
available emergency override (can alter the control flow by updating the LCE status database.)
Note: This is not standard operating procedure and should only be performed in very rare cases.
LCE waits a maximum of CheckArchiveDone
state indefinitely in the rare case that