On 9/30/2010 4:11 AM, Kaya Saman wrote:
I mean for a DNS server (all be it a small one) is it wise to use
compact flash as storage??
For our GSLB DNS Slaves, we boot embedded/low power (or even VMs these
days) systems with CF images off of flash, keep a shadow copy of /etc
around, and program all file systems with R/W activity
(/var/chroot/named/cache, where all zone files are fetched from Master
NS) on MFS partitions, eliminating almost all write operations to the CF
card.
No swap, and RD / (/var, etc.) and MFS /usr extracted from a tarball via
modified rc(8). /shadow is mounted noatime.
Minimal writes to flash. The systems boot in about 30 seconds.
We actually run NetBSD, but we've done similar models on FreeBSD.
No CF card failures reported in five (5) years. We use Transcend
Industrial series.
Where it gets risky is if you just plain install a live functional
FreeBSD on CF. A million inodes for /usr/src and CF is about as fast as
an ESDI hard drive in an IBM XT.
~BAS
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