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FreeBSD General Other questions regarding FreeBSD which do not fit in any of the categories below. |
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ZFS
Dear ZFS guru's
I never had a I386 computer with enough RAM to play with ZFS. I now have one with 2GB memory. Is http://wiki.freebsd.org/ZFSTuningGuide still applicable for such a system? I only have a single disk in it, but I just want to play with ZFS snapshots and jails. Any suggestions or helpful advice for a ZFS noob ?
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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Code:
# uptime 11:24AM up 148 days, 2:26, 2 users, load averages: 0.04, 0.18, 0.11 ... any reasons to stick to i386?
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religions, worst damnation of mankind "If 386BSD had been available when I started on Linux, Linux would probably never had happened." Linus Torvalds Linux is not UNIX! Face it! It is not an insult. It is fact: GNU is a recursive acronym for “GNU's Not UNIX”. vermaden's: links resources deviantart spreadbsd |
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Vermaden, so the following from http://wiki.freebsd.org/ZFSTuningGuide#amd64 nowadays even seems to apply to amd64 systems with only 1 GB of memory .....
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The recently acquired 2GB system has a Pentium IV cpu, so strictly i386 only : Code:
OpenBSD 5.0-current (GENERIC) #71: Fri Oct 7 12:57:13 MDT 2011 deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel(R) Pentium(R) 4 CPU 3.20GHz ("GenuineIntel" 686-class) 3.20 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36, CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,CNXT-ID,xTPR real mem = 2146693120 (2047MB) avail mem = 2101518336 (2004MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 03/17/05, BIOS32 rev. 0 @ 0xf0010, SMBIOS rev. 2.3 @ 0xf04b0 (65 entries) bios0: vendor American Megatrends Inc. version "1009.001" date 03/17/2005 bios0: ASUSTeK Computer Inc. P5P800 @graudeejs Thanks for the tweaks I will try them and report back.
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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Depending on the P4 chip, you may be able to run the amd64 version of FreeBSD. You'd have to look at it under FreeBSD, though, to see if it supports LM (note the AMD features below, taken from my FreeBSD 8.2 box):
Code:
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2999.92-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf65 Family = f Model = 6 Stepping = 5 Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Features2=0xe59d<SSE3,DTES64,MON,DS_CPL,EST,TM2,CNXT-ID,CX16,xTPR,PDCM> AMD Features=0x20100000<NX,LM> AMD Features2=0x1<LAHF> TSC: P-state invariant You will also want to make sure you disabled prefetching (it should be disabled automatically, but it's good to manually disable it as well). |
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