I hereby claim:
- I am miguno on github.
- I am miguno (https://keybase.io/miguno) on keybase.
- I have a public key whose fingerprint is 0528 C791 1372 04EE C0CE 277A 796E 57B8 6D7C BA34
To claim this, I am signing this object:
miguno miguno
miguno
/ CMSHashingBenchmark.scala
Created
January 7, 2015 15:57
Benchmark for hashing implementations for CMS[BigInt] in Algebird
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| package com.twitter.algebird.caliper | |
| import com.google.caliper.{ Param, SimpleBenchmark } | |
| import com.google.common.hash.{ HashFunction, Hashing } | |
| /** | |
| * Benchmarks the hashing algorithms used by Count-Min sketch for CMS[BigInt]. | |
| * | |
| * The input values are generated ahead of time to ensure that each trial uses the same input (and that the RNG is not | |
| * influencing the runtime of the trials). |
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| private def entropy(counts: Vector[Long], totalCount: Double): Double = { | |
| if (totalCount == 0) { | |
| return 0 | |
| } | |
| def log2(x: Double) = scala.math.log(x) / scala.math.log(2) | |
| counts.filter(_ != 0).map { count => | |
| val freq = 1.0 * count / totalCount | |
| freq * log2(freq) | |
| }.foldLeft(0.0) { case (agg, i) => agg - i } |
miguno
/ kafka-move-leadership.sh
Last active
July 6, 2023 19:53
A simple Ops helper script for Apache Kafka to generate a partition reassignment JSON snippet for moving partition leadership away from a given Kafka broker. Use cases include 1) safely restarting a broker while minimizing risk of data loss, 2) replacing a broker, 3) preparing a broker for maintenance.
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| #!/usr/bin/env bash | |
| # | |
| # File: kafka-move-leadership.sh | |
| # | |
| # Description | |
| # =========== | |
| # | |
| # Generates a Kafka partition reassignment JSON snippet to STDOUT to move the leadership | |
| # of any replicas away from the provided "source" broker to different, randomly selected | |
| # "target" brokers. Run this script with `-h` to show detailed usage instructions. |
miguno
/ zk_is_synced.sh
Created
May 29, 2015 13:56
Rudimentary check whether all servers/members of a ZooKeeper ensemble are synchronized / in sync.
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| $ for zk in `seq 1 3`; do echo stat | nc zookeeper${zk} 2181|egrep "^(Zxid|Node)"; done | |
| Zxid: 0x46d1b3ebc | |
| Node count: 4557 | |
| Zxid: 0x46d1b3ebc | |
| Node count: 4557 | |
| Zxid: 0x46d1b3ebf | |
| Node count: 4557 | |
| # All values should be the same, though with ongoing transactions from clients you might see the values | |
| # to diverge slightly (e.g. if you wait 1 second in between querying `stat` from zookeeper1 and zookeeper2, |
miguno
/ KafkaStreamsDistributedRealtimeJoins.java
Last active
July 11, 2016 15:47
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| // This KStream contains information such as "alice" -> 13 | |
| KStream<String, Long> userClicksStream = builder.stream(..., "user-clicks-topic"); | |
| // This KTable contains information such as "alice" -> "europe" | |
| KTable<String, String> userRegionsTable = builder.table(..., "user-regions-topic"); | |
| // Compute the number of clicks per region, e.g. "europe" -> 13 | |
| // | |
| // The resulting KTable is continuously being updated as new data records are arriving in the | |
| // input KStream `userClicksStream` and input KTable `userRegionsTable`. |
miguno
/ secure_client_app.properties
Last active
July 21, 2016 13:44
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| # Key settings to enable client authentication and SSL encryption | |
| bootstrap.servers=kafka.example.com:9093 | |
| security.protocol=SSL | |
| ssl.truststore.location=/etc/security/tls/kafka.client.truststore.jks | |
| ssl.truststore.password=test1234 | |
| ssl.keystore.location=/etc/security/tls/kafka.client.keystore.jks | |
| ssl.keystore.password=test1234 | |
| ssl.key.password=test1234 |
miguno
/ StreamsConfig.java
Last active
June 27, 2018 16:56
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| // Code of your Java application that uses the Kafka Streams library | |
| Properties settings = new Properties(); | |
| settings.put(StreamsConfig.APPLICATION_ID_CONFIG, "secure-kafka-streams-app"); | |
| settings.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "kafka.example.com:9093"); | |
| // ...further non-security related settings may follow here... | |
| settings.put(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, "SSL"); | |
| settings.put(SslConfigs.SSL_TRUSTSTORE_LOCATION_CONFIG, "/etc/security/tls/kafka.client.truststore.jks"); | |
| settings.put(SslConfigs.SSL_TRUSTSTORE_PASSWORD_CONFIG, "test1234"); | |
| settings.put(SslConfigs.SSL_KEYSTORE_LOCATION_CONFIG, "/etc/security/tls/kafka.client.keystore.jks"); | |
| settings.put(SslConfigs.SSL_KEYSTORE_PASSWORD_CONFIG, "test1234"); |
miguno
/ misconfigured_keystore_password.log
Created
July 21, 2016 13:42
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| # Misconfigured ssl.keystore.password | |
| Exception in thread "main" org.apache.kafka.common.KafkaException: Failed to construct kafka producer | |
| [...snip...] | |
| Caused by: org.apache.kafka.common.KafkaException: org.apache.kafka.common.KafkaException: java.io.IOException: Keystore was tampered with, or password was incorrect | |
| [...snip...] | |
| Caused by: java.security.UnrecoverableKeyException: Password verification failed |
miguno
/ misconfigured_ssl_password.log
Created
July 21, 2016 13:43
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| # Misconfigured ssl.key.password | |
| Exception in thread "main" org.apache.kafka.common.KafkaException: Failed to construct kafka producer | |
| [...snip...] | |
| Caused by: org.apache.kafka.common.KafkaException: org.apache.kafka.common.KafkaException: java.security.UnrecoverableKeyException: Cannot recover key | |
| [...snip...] | |
| Caused by: org.apache.kafka.common.KafkaException: java.security.UnrecoverableKeyException: Cannot recover key | |
| [...snip...] | |
| Caused by: java.security.UnrecoverableKeyException: Cannot recover key |