Which command mounts CephFS using the FUSE client?

mount -t ceph mon1:6789:/ /mnt/cephfs

You have a Ceph cluster with OSDs in two racks. You want to ensure that for a pool with replication factor 2, the two replicas are always placed in different racks to protect against a rack failure. What should you configure?

Set the pool's crush_rule to 'replicated_rule'.

Manually assign each OSD to a specific rack in the CRUSH map.

Set the pool's size to 2 and min_size to 1.

Create a CRUSH rule that uses a failure domain of 'rack'.

What is the primary purpose of placement groups (PGs) in a Ceph cluster?

To group OSDs into failure domains

To organize data into logical containers for access control

To store metadata about files in CephFS

To map objects to OSDs for placement and replication

You have a CephFS volume with a quota set on a directory. Users are reporting that they cannot create new files in the directory even though the quota has not been reached. What is the most likely cause?

The directory has reached its file count quota.

The client is using FUSE instead of the kernel driver.

LPI LPIC-3 High Availability and Storage Clusters

Domain 3Objective 2

363.2 Ceph Storage Clusters (weight: 8) LPIC-3-HIGH-AVAILABILITY Practice Questions (Page 7)

Part of the Topic 363: High Availability Distributed Storage domain, which makes up ~17% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 3–5 from this objective — we provide 35 practice questions to prepare you well beyond it. (estimate)

35questions here

7free pages

13concepts

Questions 31–35

31foundation · easy
Which command mounts CephFS using the FUSE client?
Select an answer first
32application · medium
You have a Ceph cluster with OSDs in two racks. You want to ensure that for a pool with replication factor 2, the two replicas are always placed in different racks to protect against a rack failure. What should you configure?
Select an answer first
33foundation · easy
What is the primary purpose of placement groups (PGs) in a Ceph cluster?
Select an answer first
34expert · hard
You have a CephFS volume with a quota set on a directory. Users are reporting that they cannot create new files in the directory even though the quota has not been reached. What is the most likely cause?
Select an answer first
35foundation · easy
Which command is used to stop a specific OSD daemon on a node?
Select an answer first

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