Hi Qi Yun Li,
I believe the 1 host is intended behavior since a the moment we are not supporting heterogeneous environments that is what any 1 of candidate hosts is chose to represent what cpu / memory / disk characteristics to use for recommending configurations for a component. Srimanth, can attest to this. BR, Sid ________________________________ From: Qi Yun Liu <[email protected]> Sent: Wednesday, April 15, 2015 11:34 PM To: [email protected] Subject: Re:Re: Re:How to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations? Hi Siddharth, Thanks a lot for your comments! According to your suggestions， I did a test: 1. Launch Ambari server GUI and start a brand new cluster installation 2. In 'Assign Slaves and Clients' page, select two hosts(hostname0.com, hostname1.com) as the datanodes 3. After clicking Next button, I found in the ambari-server/resources/stacks/HDP/2.2/services/stack_advisor.py#HDP22StackAdvisor#recommendHDFSConfigurations, the value of datanodeHosts got by line 'datanodeHosts = self.getHostsWithComponent("HDFS", "DATANODE", services, hosts)' only includes 1 host info as below and its length is 1 not 2: datanodeHosts= [{u'href': u'/api/v1/hosts/hostname1.com', u'Hosts': {u'last_heartbeat_time': 1429155431532, u'recovery_summary': u'DISABLED', u'host_health_report': u'', u'disk_info': [{u'available': u'83808976', u'used': u'7951800', u'percent': u'9%', u'device': u'/dev/mapper/vg_sdsvm923094-lv_root', u'mountpoint': u'/', u'type': u'ext4', u'size': u'96671468'}, {u'available': u'4031416', u'used': u'0', u'percent': u'0%', u'device': u'tmpfs', u'mountpoint': u'/dev/shm', u'type': u'tmpfs', u'size': u'4031416'}, {u'available': u'378216', u'used': u'92028', u'percent': u'20%', u'device': u'/dev/sda1', u'mountpoint': u'/boot', u'type': u'ext4', u'size': u'495844'}], u'desired_configs': None, u'cpu_count': 2, u'recovery_report': {u'component_reports': [], u'summary': u'DISABLED'}, u'host_state': u'HEALTHY', u'os_arch': u'x86_64', u'total_mem': 8062836, u'host_status': u'HEALTHY', u'last_registration_time': 1429153847302, u'os_family': u'redhat6', u'host_name': u'hostname1.com', u'ip': u'9.30.249.190', u'rack_info': u'/default-rack', u'os_type': u'redhat6', u'last_agent_env': {u'transparentHugePage': u'never', u'hostHealth': {u'agentTimeStampAtReporting': 1429155391291, u'activeJavaProcs': [], u'serverTimeStampAtReporting': 1429155391348, u'liveServices': [{u'status': u'Healthy', u'name': u'ntpd', u'desc': u''}]}, u'umask': 18, u'reverseLookup': True, u'alternatives': [], u'existingUsers': [], u'firewallName': u'iptables', u'stackFoldersAndFiles': [{u'type': u'directory', u'name': u'/etc/slider'}], u'existingRepos': [], u'installedPackages': [], u'firewallRunning': False}, u'public_host_name': u'hostname1.com', u'ph_cpu_count': 2}}] I think the correct value of datanodeHosts should not only include 'hostname1.com' but also include 'hostname0.com', and the length of datanodeHosts should be 2, but not 1, because they were all selected as datanode host. Is it a bug? At 2015-04-11 13:09:33, "Siddharth Wagle" <[email protected]<mailto:[email protected]>> wrote: Hi Qi Yun Liu, This method is what you are looking for : stacks/HDP/2.0.6/services HDP206StackAdvisor#getHostsWithComponent Example: datanodeHosts = self.getHostsWithComponent("HDFS", "DATANODE", services, hosts) In: stacks/HDP/2.2/services/ HDP22StackAdvisor#recommendHDFSConfigurations BR, Sid ________________________________ From: Qi Yun Liu <[email protected]<mailto:[email protected]>> Sent: Friday, April 10, 2015 7:13 PM To: [email protected]<mailto:[email protected]> Subject: Re:How to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations? I just wanna to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations(self, configurations, clusterData)? Anyone could help me? Thanks in advance! At 2015-04-10 15:09:18, "Qi Yun Liu" <[email protected]<mailto:[email protected]>> wrote: Hi Experts, How to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations(self, configurations, clusterData)? using its input parameters 'self', 'configurations' or 'clusterData'. At the same time, another method 'def getComponentLayoutValidations(self, services, hosts)' has a input parameter 'services', so it could get nameNodeHosts using 'services', but I failed to get parameter 'services' in method recommendHDFSConfigurations. Any comments? Thanks a lot!
