hbase

问题 I have a web-app in Django and backend in Hbase. To access hbase I'm using Apache Phoenix to query hbase. Phoenix has jdbc drivers exposed. How can I integrate Phoenix with Django ORM using these jdbc drivers? Can I write customer db adapter or is there any other way? Thanks in advance. 回答1: I have also been trying to see if it is possible to extend the ORM of django to use apache phoenix. but for a start, you can checkout JayDeBeAPI or phoenixdb As an example, I was able to connect and

问题 I have a web-app in Django and backend in Hbase. To access hbase I'm using Apache Phoenix to query hbase. Phoenix has jdbc drivers exposed. How can I integrate Phoenix with Django ORM using these jdbc drivers? Can I write customer db adapter or is there any other way? Thanks in advance. 回答1: I have also been trying to see if it is possible to extend the ORM of django to use apache phoenix. but for a start, you can checkout JayDeBeAPI or phoenixdb As an example, I was able to connect and

问题 I'm trying to test the Spark-HBase connector in the GCP context and tried to follow [1], which asks to locally package the connector [2] using Maven (I tried Maven 3.6.3) for Spark 2.4, and leads to following issue. Error "branch-2.4": [ERROR] Failed to execute goal net.alchim31.maven:scala-maven-plugin:3.2.2:compile (scala-compile-first) on project shc-core: Execution scala-compile-first of goal net.alchim31.maven:scala-maven-plugin:3.2.2:compile failed.: NullPointerException -> [Help 1]

问题 Is there a way to exclude it.I did give it a try but got ClassNotFoundException: org.apache.log4j.Level I do see that hbase-shaded-client do have slf4j dependency so there might be a way to exclude log4j and use slf4j but I'm not able to. 回答1: Yes, you can exclude log4j , but you must add back in log4j-over-slf4j . <dependency> <groupId>org.apache.hbase</groupId> <artifactId>hbase-client</artifactId> <version>[some version]</version> <exclusions> <exclusion> <artifactId>log4j</artifactId>

问题 I am trying to export data from HBase table 'mytable' which rowkey starts with 'abc'. scan 'mytable', {ROWPREFIXFILTER => 'abc'} The above exported data need to be imported into the another cluster by changing the rowkey prefix from 'abc' to 'def' Old Data: hbase(main):002:0> scan 'mytable', {ROWPREFIXFILTER => 'abc'} ROW COLUMN+CELL abc-6535523 column=track:aid, timestamp=1339121507633, value=some stream/pojos New Data: (In another cluster) hbase(main):002:0> get 'mytable', 'def-6535523' ROW

问题 I have some sample data as below: test_a test_b test_c test_d test_date ------------------------------------------------- 1 a 500 0.1 111 20191101 2 a NaN 0.2 NaN 20191102 3 a 200 0.1 111 20191103 4 a 400 NaN 222 20191104 5 a NaN 0.2 333 20191105 I would like to let those data store in Hbase, and I use the below code to achieve it. from test.db import impala, hbasecon, HiveClient import pandas as pd sql = """ SELECT test_a ,test_b ,test_c ,test_d ,test_date FROM table_test """ conn_impa =

问题 I am trying to write a simple program to connect to HBase server through thrift which is started in Http mode.(cluster is kerberized ) but I always gets 'read zero bytes error message' I have refered below links but those examples work only if the thrift server starts in Binary mode (??) https://github.com/joshelser/hbase-thrift1-python-sasl/blob/master/get_row.py, I did Klist and Kinit everything looks fine and also I have followed below HDP documentation and my setup is correct https:/

问题 Because HBase is based on HDFS, and that HDFS doesn't have update features, I was wondering if the update operations on it rewrites the whole HFILE files on hadoop? thanks 回答1: There are no updates in HBase. When you perform a delete in HBase (the whole row or particular cells), a special deletion marker is added to a cell. Upcoming scans or get operations would not see that cell(s). When you perform an insert, you just create a new cell with current timestamp. Scan and get operations will

问题 I am new to HBase, I find in HBase client API, update operation is not supported? Is that correct? If so, what is the suggested best practices to update the values for a specific rowkey? 回答1: You can use PUT which will create or update the value of any cell. You don't need to use delete unless you want the new version to not have some of the old cells . say we have r1:f1:c1:value1 r1:f1:c2:value2 you can put r1:f1:c1 new value and you'd get: r1:f1:c1:new value r1:f1:c2:value2 Note that

问题 I do have existing hbase table & for SQL support I am trying to explore if I can create apache phoenix table. I would like to know if I create phoenix table on existing hbase table, does it replicate (or copy) data present in hbase table, or phoenix table just links to existing data present in hbase? My phoenix version is <4.12.0 so this error still applies on my version & hence can't create View on top of existing hbase table. 回答1: We can create a Phoenix table on top of the existing Hbase