Network & Infrastructure
A Linux host temporarily stops transmitting on one queue while link state remains up. Driver, firmware or queue-processing issues can differ from ordinary congestion loss.
Linux Networking & Host Performance1 นาทีในการอ่าน
อ่านบทความ : Transmit queue stalls with a healthy physical link
Network & Infrastructure
A service cannot open new outbound connections to one destination even though the network is reachable. Its local source-port space may be constrained by connection churn and retained state.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : Ephemeral-port exhaustion in a high-churn client application
Network & Infrastructure
An operator sees many TIME_WAIT sockets after a benchmark and assumes the kernel is leaking connections. The state can be a normal consequence of many short-lived TCP sessions.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : TIME_WAIT as connection correctness state rather than a leak
Network & Infrastructure
A host takes an unexpected path after a policy change, and a generic route-cache flush is proposed. The real issue may be policy precedence, source selection or a different namespace.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : Destination-specific Linux routing evidence instead of cache folklore
Network & Infrastructure
New neighbors fail to resolve on a dense node while established endpoints remain reachable. Neighbor-table pressure can become a constraint before address space or link bandwidth is exhausted.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : Neighbor-table pressure in dense host and container networks
Network & Infrastructure
A workload stalls on large transfers while host-originated tests work. The namespace's route, tunnel path or feedback delivery can differ from the host's own connection.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : PMTU evidence across namespaces and host forwarding
Network & Infrastructure
Increasing socket buffers improves one transfer but destabilizes a server with thousands of connections. Per-connection headroom can multiply into a significant aggregate memory requirement.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : Socket-buffer tuning and aggregate memory pressure
Network & Infrastructure
An emergency routing or MTU correction works until a network manager renews the interface. Runtime commands and the host's persistent desired configuration are out of sync.
Linux Networking & Host Performance2 นาทีในการอ่าน
อ่านบทความ : Runtime networking fixes lost after interface renewal
Network & Infrastructure
Clients report slow I/O while the cluster remains available. A slow-operation warning can reflect disk, network, CPU or a dependency between these resources rather than one universal failure.
Storage Networks & Distributed Data2 นาทีในการอ่าน
อ่านบทความ : Ceph slow operations: storage latency or network delay
Network & Infrastructure
OSDs are marked down during backup bursts even though their hosts remain powered on. Shared transport congestion or processing delay may prevent timely heartbeat exchange.
Storage Networks & Distributed Data1 นาทีในการอ่าน
อ่านบทความ : Ceph heartbeat failures and shared-network contention
Network & Infrastructure
Client connections appear normal while replication and recovery are unreliable. The affected traffic may traverse a different VLAN, bond or jumbo-frame path from the client network.
Storage Networks & Distributed Data2 นาทีในการอ่าน
อ่านบทความ : MTU mismatch on a Ceph replication network
Network & Infrastructure
After an OSD failure, client latency rises sharply while the cluster rebuilds protection. Recovery is necessary, but its resource demand can exceed the service's spare capacity.
Storage Networks & Distributed Data1 นาทีในการอ่าน
อ่านบทความ : Recovery traffic competing with production storage latency