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redis.go
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redis.go
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package devops
import (
"fmt"
"math/rand"
"time"
"github.com/timescale/tsbs/cmd/tsbs_generate_data/common"
"github.com/timescale/tsbs/cmd/tsbs_generate_data/serialize"
)
var (
labelRedis = []byte("redis") // heap optimization
labelRedisTagPort = []byte("port")
labelRedisTagServer = []byte("server")
labelRedisFieldUptime = []byte("uptime_in_seconds")
sixteenGB = float64(16 * 1024 * 1024 * 1024)
// Reuse NormalDistributions as arguments to other distributions. This is
// safe to do because the higher-level distribution advances the ND and
// immediately uses its value and saves the state
redisLowND = common.ND(5, 1)
redisHighND = common.ND(50, 1)
RedisFields = []labeledDistributionMaker{
{[]byte("total_connections_received"), func() common.Distribution { return common.MWD(redisLowND, 0) }},
{[]byte("expired_keys"), func() common.Distribution { return common.MWD(redisHighND, 0) }},
{[]byte("evicted_keys"), func() common.Distribution { return common.MWD(redisHighND, 0) }},
{[]byte("keyspace_hits"), func() common.Distribution { return common.MWD(redisHighND, 0) }},
{[]byte("keyspace_misses"), func() common.Distribution { return common.MWD(redisHighND, 0) }},
{[]byte("instantaneous_ops_per_sec"), func() common.Distribution { return common.WD(common.ND(1, 1), 0) }},
{[]byte("instantaneous_input_kbps"), func() common.Distribution { return common.WD(common.ND(1, 1), 0) }},
{[]byte("instantaneous_output_kbps"), func() common.Distribution { return common.WD(common.ND(1, 1), 0) }},
{[]byte("connected_clients"), func() common.Distribution { return common.CWD(redisHighND, 0, 10000, 0) }},
{[]byte("used_memory"), func() common.Distribution { return common.CWD(redisHighND, 0, sixteenGB, sixteenGB/2) }},
{[]byte("used_memory_rss"), func() common.Distribution { return common.CWD(redisHighND, 0, sixteenGB, sixteenGB/2) }},
{[]byte("used_memory_peak"), func() common.Distribution { return common.CWD(redisHighND, 0, sixteenGB, sixteenGB/2) }},
{[]byte("used_memory_lua"), func() common.Distribution { return common.CWD(redisHighND, 0, sixteenGB, sixteenGB/2) }},
{[]byte("rdb_changes_since_last_save"), func() common.Distribution { return common.CWD(redisHighND, 0, 10000, 0) }},
{[]byte("sync_full"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("sync_partial_ok"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("sync_partial_err"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("pubsub_channels"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("pubsub_patterns"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("latest_fork_usec"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("connected_slaves"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("master_repl_offset"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("repl_backlog_active"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("repl_backlog_size"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("repl_backlog_histlen"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("mem_fragmentation_ratio"), func() common.Distribution { return common.CWD(redisLowND, 0, 100, 0) }},
{[]byte("used_cpu_sys"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("used_cpu_user"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("used_cpu_sys_children"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
{[]byte("used_cpu_user_children"), func() common.Distribution { return common.CWD(redisLowND, 0, 1000, 0) }},
}
)
type RedisMeasurement struct {
*subsystemMeasurement
port, serverName []byte
uptime time.Duration
}
func NewRedisMeasurement(start time.Time) *RedisMeasurement {
sub := newSubsystemMeasurementWithDistributionMakers(start, RedisFields)
serverName := []byte(fmt.Sprintf("redis_%d", rand.Intn(100000)))
port := []byte(fmt.Sprintf("%d", rand.Intn(20000)+1024))
return &RedisMeasurement{
subsystemMeasurement: sub,
port: port,
serverName: serverName,
uptime: time.Duration(0),
}
}
func (m *RedisMeasurement) Tick(d time.Duration) {
m.subsystemMeasurement.Tick(d)
m.uptime += d
}
func (m *RedisMeasurement) ToPoint(p *serialize.Point) {
p.AppendField(labelRedisFieldUptime, int64(m.uptime.Seconds()))
m.toPointAllInt64(p, labelRedis, RedisFields)
p.AppendTag(labelRedisTagPort, m.port)
p.AppendTag(labelRedisTagServer, m.serverName)
}