-1

regarding to hive in hadoop cluster

what is the meaning of the following

hive   - nofile 30000
hive   - nproc  18000

the file:

 more /etc/security/limits.d/hive.conf

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hive   - nofile 30000
hive   - nproc  18000
  • Number of (open?) files and number of (concurrently running?) processes? Possibly upper limits? – Kusalananda May 29 at 19:25
0

See /etc/security/limits.conf or man 5 limits.conf:

$ cat /etc/security/limits.conf 
# /etc/security/limits.conf
#
#This file sets the resource limits for the users logged in via PAM.
#It does not affect resource limits of the system services.
#
#Also note that configuration files in /etc/security/limits.d directory,
#which are read in alphabetical order, override the settings in this
#file in case the domain is the same or more specific.
#That means for example that setting a limit for wildcard domain here
#can be overriden with a wildcard setting in a config file in the
#subdirectory, but a user specific setting here can be overriden only
#with a user specific setting in the subdirectory.
#
#Each line describes a limit for a user in the form:
#
#<domain>        <type>  <item>  <value>
#
#Where:
#<domain> can be:
#        - a user name
#        - a group name, with @group syntax
#        - the wildcard *, for default entry
#        - the wildcard %, can be also used with %group syntax,
#                 for maxlogin limit
#
#<type> can have the two values:
#        - "soft" for enforcing the soft limits
#        - "hard" for enforcing hard limits
#
#<item> can be one of the following:
#        - core - limits the core file size (KB)
#        - data - max data size (KB)
#        - fsize - maximum filesize (KB)
#        - memlock - max locked-in-memory address space (KB)
#        - nofile - max number of open file descriptors
#        - rss - max resident set size (KB)
#        - stack - max stack size (KB)
#        - cpu - max CPU time (MIN)
#        - nproc - max number of processes
#        - as - address space limit (KB)
#        - maxlogins - max number of logins for this user
#        - maxsyslogins - max number of logins on the system
#        - priority - the priority to run user process with
#        - locks - max number of file locks the user can hold
#        - sigpending - max number of pending signals
#        - msgqueue - max memory used by POSIX message queues (bytes)
#        - nice - max nice priority allowed to raise to values: [-20, 19]
#        - rtprio - max realtime priority

In particular:

  • nofile - max number of open file descriptors
  • nproc - max number of processes
  • I also see that from searching in googl , what I want to understand is what exactly the meaning of - max number of open file descriptors , how it affected on number of hive connections ? – yael May 29 at 22:04
  • Then that's what you should ask in the question, isn't it? – muru May 29 at 22:14
  • sorry if I was not clear – yael May 29 at 22:24

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