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NexentaStor 1.0.5 (Default branch)
07-29-2008
NexentaStor leverages the ZFS file system and is optimized for use in 2nd-tier NAS and iSCSI applications requiring open, low cost, high performance storage as well as dramatically simplified provisioning, expansion, backup, replication, and archiving. It is also used as a primary NAS in businesses that wish to expand at closer to commodity pricing. It supports unlimited snapshots, snapshot mirroring (replication), block level mirroring, integrated search, and easy management of extremely large storage pools. License: Other/Proprietary License with Free Trial Changes:|
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NSTREVENT(5) File Formats Manual NSTREVENT(5) NAME
NSTREVENT - maximum number of outstanding STREAMS bufcalls VALUES
Failsafe Default Allowed values Recommended values DESCRIPTION
This tunable limits the maximum number of outstanding that are allowed to exist in the system at any given time. This tunable is intended to protect the system against resource overload caused by the combination of modules running in all streams issu- ing an excessive number of The value selected should be equal to or greater than the combined maximum number of that can be reasonably expected during normal operation from all streams on the system. are used by STREAMS modules in low memory situations. Who Is Expected to Change This Tunable? Any customer. Restrictions on Changing Changes to this tunable take effect at next reboot. When Should the Value of This Tunable Be Raised? When the system has a lot of low memory situations. What Are the Side Effects of Raising the Value of This Tunable? If too big a number is chosen, the STREAMS subsystem preallocates more memory for internal data structures than may be needed. This reduces the amount of memory available to applications and the system. When Should the Value of This Tunable Be Lowered? If the tunable is increased for a particular STREAMS module/driver, this tunable can be lowered when that STREAMS module/driver is removed. It should be returned to its previous value. However, HP does not recommend a value lower than the default value. What Are the Side Effects of Lowering the Value of This Tunable? During low memory situations, it will bring down system performance. What Other Tunable Should Be Changed at the Same Time as This One? None. WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of HP-UX. Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun- able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see at AUTHOR
was developed by HP. Tunable Kernel Parameters NSTREVENT(5)