[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16560029#comment-16560029 ] Hari Sekhon commented on HBASE-20883: - I probably won't get round to this any time soon as I solved it quickly by writing an external tool before raising this ticket and am on to the next thing, I merely raised this as a future improvement to do at some point. Request breakdowns by region and by regionserver are available along with a selection of other HBase tools in my PyTools github repo: [https://github.com/HariSekhon/pytools] > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16554521#comment-16554521 ] Andrew Purtell commented on HBASE-20883: You have convinced me. If you can provide a patch, I will commit it. > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16553998#comment-16553998 ] Hari Sekhon commented on HBASE-20883: - I agree with you [~apurtell]... for the larger clusters they will need more tooling anyway, but a lot of customers these days are running smaller clusters of higher performance/density and tuning them to make use of the previously overspec'd enterprise hardware (that's what I'm doing right now in fact). it's surprising what one can do with a dozen or two high spec machines these days, so this would be of benefit to a lot of these middle users who aren't internet giants, which seem to make up more of the user base in the last few years than the bigger name internet companies of old. > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16547167#comment-16547167 ] Andrew Purtell commented on HBASE-20883: bq. Would it hurt to also expose that information in the UI as well given that Total Requests Per Sec are already there I'm not telling anyone not to do it, just that it won't be useful for moderate to large clusters. (shrug) > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16546211#comment-16546211 ] Hari Sekhon commented on HBASE-20883: - Ok. Would it hurt to also expose that information in the UI as well given that Total Requests Per Sec are already there and it's only 2 extra columns next to it with similarly small info? There is already a lot of info on the HMaster UI so I can't imagine this would break the camel's back. > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16545463#comment-16545463 ] Andrew Purtell commented on HBASE-20883: bq. , it doesn't seem like it hurts to expose that same information in JMX. It doesn't, and I was talking about the UI, so let's be clear about that. > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16545231#comment-16545231 ] Hari Sekhon commented on HBASE-20883: - [~andrewcheng] thanks for mentioning the other ticket but it's not exactly the same issue. That asks to use a more accurate counting to account for multi requests. I'm just asking that the Read + Writes Requests Per Sec are shown in the UI next to each RegionServer which already shows the Total Requests Per Sec, to be able to detect Read or Write skew more easily. > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[
https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16545229#comment-16545229
]
Hari Sekhon commented on HBASE-20883:
-
{quote}This won't scale
{quote}
HMaster UI already shows Total Requests Per Sec next to each RegionServer,
which I think is already calculated from readRequestCount + writeRequestCount
or totalRequestCount differentials. It's just two more columns to expose that
information in the existing table.
I already have OpenTSDB but it's handy for some tools and scripts to be able to
get this information from HBase directly, perhaps you don't want to have to set
up OpenTSDB on HBase to be able to debug somebody's HBase installation and
since it appears that HMaster is already collecting and averaging the
information, it doesn't seem like it hurts to expose that same information in
JMX.
> HMaster Read / Write Requests Per Sec across RegionServers, currently only
> Total Requests Per Sec
> --
>
> Key: HBASE-20883
> URL: https://issues.apache.org/jira/browse/HBASE-20883
> Project: HBase
> Issue Type: Improvement
> Components: Admin, master, metrics, monitoring, UI, Usability
>Affects Versions: 1.1.2
>Reporter: Hari Sekhon
>Priority: Major
>
> HMaster currently shows Requests Per Second per RegionServer under HMaster
> UI's /master-status page -> Region Servers -> Base Stats section in the Web
> UI.
> Please add Reads Per Second and Writes Per Second per RegionServer alongside
> this in the HMaster UI, and also expose the Read/Write/Total requests per sec
> information in the HMaster JMX API.
> This will make it easier to find read or write hotspotting on HBase as a
> combined total will minimize and mask differences between RegionServers. For
> example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer,
> so write skew will be masked as it won't show enough significant difference
> in the much larger combined Total Requests Per Second stat.
> For now I've written a Python tool to calculate this info from RegionServers
> JMX read/write/total request counts but since HMaster is collecting this info
> anyway it shouldn't be a big change to improve it to also show Reads / Writes
> Per Sec as well as Total.
> Find my tools for more granular Read/Write Requests Per Sec Per Regionserver
> and also Per Region at my [PyTools github
> repo|https://github.com/harisekhon/pytools] along with a selection of other
> HBase tools I've used for performance debugging over the years.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16543885#comment-16543885 ] Andrew Purtell commented on HBASE-20883: bq. Please add Reads Per Second and Writes Per Second per RegionServer alongside this in the HMaster UI, This won't scale. At 100 nodes the list will be unwieldy. What happens when you have a cluster of 500? 1000? 2000? bq. also expose the Read/Write/Total requests per sec information in the HMaster JMX API. We could do this, since ClusterStatus information is already available in the master. Note however that all production deployments should be exporting metrics to a metrics collection system and database (such as OpenTSDB or Argus), and when you do this then a simple query of the metrics DB will give you the same information. > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Commented] (HBASE-20883) HMaster Read / Write Requests Per Sec across RegionServers, currently only Total Requests Per Sec
[ https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16542919#comment-16542919 ] Guangxu Cheng commented on HBASE-20883: --- Duplicate of HBASE-20626? > HMaster Read / Write Requests Per Sec across RegionServers, currently only > Total Requests Per Sec > -- > > Key: HBASE-20883 > URL: https://issues.apache.org/jira/browse/HBASE-20883 > Project: HBase > Issue Type: Improvement > Components: Admin, master, metrics, monitoring, UI, Usability >Affects Versions: 1.1.2 >Reporter: Hari Sekhon >Priority: Major > > HMaster currently shows Requests Per Second per RegionServer under HMaster > UI's /master-status page -> Region Servers -> Base Stats section in the Web > UI. > Please add Reads Per Second and Writes Per Second per RegionServer alongside > this in the HMaster UI, and also expose the Read/Write/Total requests per sec > information in the HMaster JMX API. > This will make it easier to find read or write hotspotting on HBase as a > combined total will minimize and mask differences between RegionServers. For > example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer, > so write skew will be masked as it won't show enough significant difference > in the much larger combined Total Requests Per Second stat. > For now I've written a Python tool to calculate this info from RegionServers > JMX read/write/total request counts but since HMaster is collecting this info > anyway it shouldn't be a big change to improve it to also show Reads / Writes > Per Sec as well as Total. > Find my tools for more granular Read/Write Requests Per Sec Per Regionserver > and also Per Region at my [PyTools github > repo|https://github.com/harisekhon/pytools] along with a selection of other > HBase tools I've used for performance debugging over the years. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
