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* Initialize cluster version at wall-clock time Previously, new clusters would begin at version 0. After this change, clusters will initialize at a version matching wall-clock time. Instead of using the Unix epoch (or Windows epoch), FDB clusters will use a new epoch, defaulting to January 1, 2010, 01:00:00+00:00. In the future, this base epoch will be modifiable through fdbcli, allowing administrators to advance the cluster version. Basing the version off of time allows different FDB clusters to share data without running into version issues. * Send version epoch to master * Cleanup * Update fdbserver/storageserver.actor.cpp Co-authored-by: A.J. Beamon <aj.beamon@snowflake.com> * Jump directly to expected version if possible * Fix initial version issue on storage servers * Add random recovery offset to start version in simulation * Type fixes * Disable reference time by default Enable on a cluster using the fdbcli command `versionepoch add 0`. * Use correct recoveryTransactionVersion when recovering * Allow version epoch to be adjusted forwards (to decrease the version) * Set version epoch in simulation * Add quiet database check to ensure small version offset * Fix initial version issue on storage servers * Disable reference time by default Enable on a cluster using the fdbcli command `versionepoch add 0`. * Add fdbcli command to read/write version epoch * Cause recovery when version epoch is set * Handle optional version epoch key * Add ability to clear the version epoch This causes version advancement to revert to the old methodology whereas versions attempt to advance by about a million versions per second, instead of trying to match the clock. * Update transaction access * Modify version epoch to use microseconds instead of seconds * Modify fdbcli version target API Move commands from `versionepoch` to `targetversion` top level command. * Add fdbcli tests for * Temporarily disable targetversion cli tests * Fix version epoch fetch issue * Fix Arena issue * Reduce max version jump in simulation to 1,000,000 * Rework fdbcli API It now requires two commands to fully switch a cluster to using the version epoch. First, enable the version epoch with `versionepoch enable` or `versionepoch set <versionepoch>`. At this point, versions will be given out at a faster or slower rate in an attempt to reach the expected version. Then, run `versionepoch commit` to perform a one time jump to the expected version. This is essentially irreversible. * Temporarily disable old targetversion tests * Cleanup * Move version epoch buggify to sequencer This will cause some issues with the QuietDatabase check for the version offset - namely, it won't do anything, since the version epoch is not being written to the txnStateStore in simulation. This will get fixed in the future. Co-authored-by: A.J. Beamon <aj.beamon@snowflake.com> |
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| .. | ||
| fdb | ||
| tests | ||
| CMakeLists.txt | ||
| MANIFEST.in | ||
| README.rst | ||
| setup.cfg | ||
| setup.py.cmake | ||
| setup.py.in | ||
README.rst
Complete documentation of the FoundationDB Python API can be found at https://apple.github.io/foundationdb/api-python.html. These bindings require the FoundationDB client. The client can be obtained from https://www.foundationdb.org/download/.