Categorie: ceph

Ceph – full blown NVMe cluster

Ceph is open source software designed to provide highly scalable object-, block- and file-based storage under a unified system. Ceph storage clusters are designed to run on commodity hardware, using an algorithm called CRUSH (Controlled Replication Under Scalable Hashing) to ensure data is evenly distributed across the cluster and that all cluster nodes can retrieve ...


Ceph TCP Performance Tuning Ubuntu

Below are a few TCP tunables that I ran into when looking into TCP performance tuning for CEPH based on our 10Gbit configuration. [code]# 10GE/32MB (33554432) #net.core.rmem_max = 33554432 #net.core.wmem_max = 33554432 #net.core.rmem_default = 33554432 #net.core.wmem_default = 33554432 #net.core.optmem_max = 40960 #net.ipv4.tcp_rmem = 4096 87380 33554432 #net.ipv4.tcp_wmem = 4096 65536 33554432 # 10GB/54MB (56623104) net.core.rmem_max ...