Practise the standard verbs for managing ZooKeeper ensemble quorum safely.
0 / 5 completed
1 / 5
Fill in: 'We ___ a ZooKeeper ensemble with an odd number of nodes so a network split can never leave two equally sized halves both claiming quorum.'
We 'size an ensemble' — the standard, simple collocation for choosing the node count of a ZooKeeper cluster. The other options are less idiomatic here.
2 / 5
Fill in: 'Losing more than half the ensemble's nodes at once can ___ the remaining servers unable to reach quorum, stalling every write until enough nodes rejoin.'
We say losing a majority will 'leave' the ensemble unable to reach quorum — the standard, natural collocation for the resulting outage. The other options aren't idiomatic here.
3 / 5
Fill in: 'We ___ ensemble membership carefully during a rolling upgrade, one node at a time, so quorum is never briefly lost while nodes are being replaced.'
We 'change membership' — the standard, simple collocation for altering which nodes belong to an ensemble. The other options are less idiomatic here.
4 / 5
Fill in: 'We ___ leader election latency after any ensemble change, since a slow election can leave dependent services briefly unable to coordinate at all.'
We 'monitor' latency — the standard collocation for ongoing observation of a coordination-service metric. The other options aren't idiomatic here.
5 / 5
Fill in: 'We ___ a failed follower back into the ensemble once it's caught up on the transaction log, rather than leaving quorum permanently thinner than intended.'
We 'restore a follower' — the standard, established collocation for bringing a recovered node back into full participation. The other options aren't the recognised term here.