Just upgraded myself. Went just fine no issues. 3 OSDs. I got some interesting data after upgrading:
Ceph Squid → Tentacle Upgrade Benchmark Summary
Cluster: 3-node Proxmox (Intel NUC14, NVMe)
Pool: ceph-vms (replicated, size 2 / min_size 2)
Upgrade Date: 2026-01-16
RBD Bench (from Proxmox host)
| Test | Pre-Upgrade (Squid 19.2.3) | Post-Upgrade (Tentacle 20.2) | Change |
|---|
| 4K Random IOPS | 60,207 | 68,516 | +13.8% |
| 4K Random BW | 235 MB/s | 268 MB/s | +14.0% |
| 64K Seq IOPS | 7,488 | 10,120 | +35.1% |
| 64K Seq BW | 468 MB/s | 632 MB/s | +35.0% |
Test script:
Bash:
#!/bin/bash
# Save as: ceph-bench.sh
POOL="ceph-vms"
IMAGE="bench-test-$(date +%s)"
SIZE="10G"
echo "=== Ceph RBD Benchmark ==="
echo "Date: $(date)"
echo "Pool: $POOL"
ceph -s | grep -E "health|mon:|osd:"
echo ""
# Create test image
rbd create $IMAGE --size $SIZE --pool $POOL
echo "--- 4K Random Read/Write (VM typical workload) ---"
rbd bench --io-type rw --io-size 4K --io-threads 16 \
--io-total 1G --io-pattern rand $POOL/$IMAGE
echo ""
echo "--- 64K Sequential Read/Write (file transfers) ---"
rbd bench --io-type rw --io-size 64K --io-threads 8 \
--io-total 2G --io-pattern seq $POOL/$IMAGE
# Cleanup
rbd rm $POOL/$IMAGE
echo ""
echo "=== Benchmark Complete ==="
