stats

const (
	KindCounter = "counter"
	KindTotal   = "total"
	KindSize    = "size"

	KindSpecial = "special" // uptime

	KindGauge              = "gauge"  // disk I/O
	KindComputedThroughput = "compbw" // disk read/write throughput

	KindLatency    = "latency" // computed internally over 'periodic.stats_time' (milliseconds)
	KindThroughput = "bw"      // ditto (MB/s)
)

const (
	VarlabBucket    = "bucket"
	VarlabXactKind  = "xkind"
	VarlabXactID    = "xid"
	VarlabMountpath = "mountpath"
)

const (
	// KindCounter:
	// all basic counters are accompanied by the corresponding (errPrefix + kind) error count:
	// e.g.: "get.n" => "err.get.n", "put.n" => "err.put.n", etc.
	GetCount    = "get.n" // GET(object) count = (cold + warm)
	PutCount    = "put.n" // ditto PUT
	HeadCount   = "head.n"
	AppendCount = "append.n"
	DeleteCount = "del.n"
	RenameCount = "ren.n"
	ListCount   = "lst.n" // list-objects

	// error counters
	// see also: `Inc`, `regCommon`, `ioErrNames`
	ErrGetCount    = errPrefix + GetCount
	ErrPutCount    = errPrefix + PutCount
	ErrHeadCount   = errPrefix + HeadCount
	ErrAppendCount = errPrefix + AppendCount
	ErrDeleteCount = errPrefix + DeleteCount
	ErrRenameCount = errPrefix + RenameCount
	ErrListCount   = errPrefix + ListCount

	ErrKaliveCount = errPrefix + "kalive.n"

	// more errors
	// (for even more errors, see target_stats)
	ErrHTTPWriteCount = errPrefix + "http.write.n"
	ErrDownloadCount  = errPrefix + "dl.n"

	// KindLatency
	// latency stats have numSamples used to compute average latency
	GetLatency         = "get.ns"
	GetLatencyTotal    = "get.ns.total"
	GetE2ELatencyTotal = "e2e.get.ns.total" // end to end (e2e) cold-GET latency
	ListLatency        = "lst.ns"
	KeepAliveLatency   = "kalive.ns"

	// KindSpecial
	Uptime = "up.ns.time"

	// KindGauge, cos.NodeStateFlags enum
	NodeAlerts = cos.NodeAlerts // "state.flags"
)

const (
	LruEvictCount = "lru.evict.n"
	LruEvictSize  = "lru.evict.size"

	CleanupStoreCount = "cleanup.store.n"
	CleanupStoreSize  = "cleanup.store.size"

	VerChangeCount = "ver.change.n"
	VerChangeSize  = "ver.change.size"

	// errors
	ErrPutCksumCount = errPrefix + "put.cksum.n"

	ErrFSHCCount = errPrefix + "fshc.n"

	// IO errors (must have ioErrPrefix)
	IOErrGetCount    = ioErrPrefix + "get.n"
	IOErrPutCount    = ioErrPrefix + "put.n"
	IOErrDeleteCount = ioErrPrefix + "del.n"

	// KindLatency
	PutLatency         = "put.ns"
	PutLatencyTotal    = "put.ns.total"
	PutE2ELatencyTotal = "e2e.put.ns.total" // end to end (e2e) write-through PUT latency
	AppendLatency      = "append.ns"
	GetRedirLatency    = "get.redir.ns"
	PutRedirLatency    = "put.redir.ns"
	DloadLatencyTotal  = "dl.ns.total"
	HeadLatency        = "head.ns"
	HeadLatencyTotal   = "head.ns.total"

	// Dsort
	DsortCreationReqCount    = "dsort.creation.req.n"
	DsortCreationRespCount   = "dsort.creation.resp.n"
	DsortCreationRespLatency = "dsort.creation.resp.ns"
	DsortExtractShardDskCnt  = "dsort.extract.shard.dsk.n"
	DsortExtractShardMemCnt  = "dsort.extract.shard.mem.n"
	DsortExtractShardSize    = "dsort.extract.shard.size" // uncompressed

	// Downloader
	DloadSize = "dl.size"

	// KindThroughput
	GetThroughput = "get.bps" // bytes per second
	PutThroughput = "put.bps" // ditto

	// same as above via `.cumulative`
	GetSize = "get.size"
	PutSize = "put.size"

	// core
	RemoteDeletedDelCount = core.RemoteDeletedDelCount // compare w/ common `DeleteCount`

	LcacheCollisionCount = core.LcacheCollisionCount
	LcacheEvictedCount   = core.LcacheEvictedCount
	LcacheErrCount       = core.LcacheErrCount
	LcacheFlushColdCount = core.LcacheFlushColdCount
)

const (
	ConstlabNode = "node_id"
)