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主機整體設定在安裝期間的變更方式
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在裸機系統上、 StorageGRID 會對整個主機進行一些變更 sysctl
設定:
會進行下列變更:
# Recommended Cassandra setting: CASSANDRA-3563, CASSANDRA-13008, DataStax documentation vm.max_map_count = 1048575 # core file customization # Note: for cores generated by binaries running inside containers, this # path is interpreted relative to the container filesystem namespace. # External cores will go nowhere, unless /var/local/core also exists on # the host. kernel.core_pattern = /var/local/core/%e.core.%p # Set the kernel minimum free memory to the greater of the current value or # 512MiB if the host has 48GiB or less of RAM or 1.83GiB if the host has more than 48GiB of RTAM vm.min_free_kbytes = 524288 # Enforce current default swappiness value to ensure the VM system has some # flexibility to garbage collect behind anonymous mappings. Bump watermark_scale_factor # to help avoid OOM conditions in the kernel during memory allocation bursts. Bump # dirty_ratio to 90 because we explicitly fsync data that needs to be persistent, and # so do not require the dirty_ratio safety net. A low dirty_ratio combined with a large # working set (nr_active_pages) can cause us to enter synchronous I/O mode unnecessarily, # with deleterious effects on performance. vm.swappiness = 60 vm.watermark_scale_factor = 200 vm.dirty_ratio = 90 # Turn off slow start after idle net.ipv4.tcp_slow_start_after_idle = 0 # Tune TCP window settings to improve throughput net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 net.ipv4.tcp_rmem = 4096 524288 8388608 net.ipv4.tcp_wmem = 4096 262144 8388608 net.core.netdev_max_backlog = 2500 # Turn on MTU probing net.ipv4.tcp_mtu_probing = 1 # Be more liberal with firewall connection tracking net.ipv4.netfilter.ip_conntrack_tcp_be_liberal = 1 # Reduce TCP keepalive time to reasonable levels to terminate dead connections net.ipv4.tcp_keepalive_time = 270 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.tcp_keepalive_intvl = 30 # Increase the ARP cache size to tolerate being in a /16 subnet net.ipv4.neigh.default.gc_thresh1 = 8192 net.ipv4.neigh.default.gc_thresh2 = 32768 net.ipv4.neigh.default.gc_thresh3 = 65536 net.ipv6.neigh.default.gc_thresh1 = 8192 net.ipv6.neigh.default.gc_thresh2 = 32768 net.ipv6.neigh.default.gc_thresh3 = 65536 # Disable IP forwarding, we are not a router net.ipv4.ip_forward = 0 # Follow security best practices for ignoring broadcast ping requests net.ipv4.icmp_echo_ignore_broadcasts = 1 # Increase the pending connection and accept backlog to handle larger connection bursts. net.core.somaxconn=4096 net.ipv4.tcp_max_syn_backlog=4096