Happy Holidays from the Nexenta Team. As we prepare for the holidays, Nexenta is also finishing up final testing and release efforts for a newly revamped 4.0 release of NexentaStor.
NexentaStor 4.0.1 (the “.1” has been added to differentiate from earlier versions of the 4.0 beta software) will be released for beta testing the first full week of January. This will be a simultaneous beta release including:
Enterprise Users – Selected enterprise customers will be testing under NDA for enterprise edition.
Reseller Partners – All of premier and certified reseller partners will have access to enterprise edition for solutions testing.
Community Users – All interested community users are invited to download and test the new 4.0.1 community edition beta software.
The software images and beta release notes will be published at the start of the beta period in January. in the interim, there are a few key updates to be aware of for those who have previously tested the earlier beta releases of NexentaStor 4.0 Community Edition (any milestone version):
Seamless Upgrade from 3.1.5 to 4.0.1 – We will be supporting an inline upgrade (rather than a reinstall) to 4.0.1. In order to be able to do a seamless upgrade, systems will have to be upgraded to the latest 3.1.5 release, and community users must be using a standard image without additional binaries installed on their NexentaStor system.
New license keys – In order to support a seamless upgrade from 3.x to 4.0.1, a previous change to the length of the machine ID has been removed. This however, will impact current 4.0 beta users, requiring 4.0.1 to be a reinstall rather than an upgrade.
Improved support for Windows clients – Support for SMB 2.1 has been added (a natural stopping point to SMB 3.0) and will be tested during beta.
Up to date Illumos kernel – The most current changes have been integrated, and Nexenta has begun updating the open source repository in preparation for the full release.
Check the Forums for the most up to date information about the beta, including question to get your feedback about monitoring beta progress.
We thank you for your patience and continued support while the 4.0 release has been reworked for the upcoming release.
Sys_zfs_vdev_max_pending
该系统配置变量控制设备 I/O 队列大小 （I/O 并发性）。
This system configuration variable controls device I/O queue size (I/O concurrency).
对于 SATA 磁盘，建议值为 ‘1’。
对于所有其他磁盘种类，请保持系统默认。
For SATA disks, the recommended value is ‘1’.
For all other disk types, please keep the system default.
请注意，调整此参数可能会影响 I/O 延迟，也许会以原始流吞吐量为代价。
Note that tuning this parameter may affect I/O latency, possibly at the expense of raw streaming throughput.
更多信息，参见 http://en.wikipedia.org/wiki/Native_Command_Queuing.
对于 7*24 运行的家用 NAS 来说，你肯定想装上可通过 Web 界面访问控制的 BT 客户端——通过动态域名服务的支持，种子在办公室或路上就可以扔到上面，苍老师在你回家之前就已躺好了……:D
这一切在 Linux 的诸多发行版下很容易实现，比如 Debian 只需用 apt-get 就基本上搞定了所有事情。而如果你的 NAS 基于 Solaris，比如 NexentaStor，这也有现成的包，但缺失了一些基本的东西——软件包没给你创建服务进程专有的用户，以及没有按照 Solaris 的标准将“服务”给定义出来。
为什么要选用 NexentaStor？NexentaStor 系出 Solaris，在商业化运作的基础上也提供 Community 版本的软件，对 OS 底层封装得非常不错，相比其他 BSD NAS 方案有着良好的用户使用体验！二则是 ZFS 的优良特性，使得其非常适合家庭持久数据的保存。
nmc@nas:/$ option expert_mode = 1
nmc@nas:/$ !bash
You are about to enter the Unix ("raw") shell and execute low-level Unix command(s). Warning: using low-level Unix commands is not recommended! Execute? (y/n)
root@nas:~# apt-get install transmission
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'network-transmission' instead of 'transmission'
The following extra packages will be installed:
library-libevent
The following NEW packages will be installed:
library-libevent network-transmission
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 30.9 MB of archives.
After this operation, 108 MB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Get:1 http://apt.dilos.org/dilos/ dilos-unstable/main library-libevent solaris-i386 1.2.10.1 [628 kB]
Get:2 http://apt.dilos.org/dilos/ dilos-unstable/main network-transmission solaris-i386 1.2.10.2 [30.3 MB]
Fetched 30.9 MB in 1min 7s (460 kB/s)
Selecting previously unselected package library-libevent.
(Reading database ... 62440 files and directories currently installed.)
Unpacking library-libevent (from .../library-libevent_1.2.10.1_solaris-i386.deb) ...
Selecting previously unselected package network-transmission.
Unpacking network-transmission (from .../network-transmission_1.2.10.2_solaris-i386.deb) ...
Setting up library-libevent (1.2.10.1) ...
Setting up network-transmission (1.2.10.2) ...
这些基本步骤过后，我们还需要配置 Transmission，而创建配置文件最方便容易的方式莫过于运行 transmission-daemon，它会为我们创建一个母本。通常情况下，这些配置文件将在当前登录的用户主目录中生成，在多用户环境中这是 OK 的，但在这里的场景下我们把它们放在 /var/transmission 目录中。
root@nas:~# mkdir /var/transmission/
root@nas:~# transmission-daemon --config-dir /var/transmission -f
[00:35:04.262] Transmission 2.73 (13592) started (session.c:720)
[00:35:04.263] RPC Server Adding address to whitelist: 127.0.0.1 (rpc-server.c:803)
[00:35:04.263] RPC Server Serving RPC and Web requests on port 127.0.0.1:9091/transmission/ (rpc-server.c:997)
[00:35:04.263] RPC Server Whitelist enabled (rpc-server.c:1001)
[00:35:04.263] UDP Failed to set receive buffer: No buffer space available (tr-udp.c:58)
[00:35:04.263] UDP Failed to set receive buffer: requested 4194304, got 57344 (tr-udp.c:77)
[00:35:04.263] DHT Generating new id (tr-dht.c:309)
[00:35:04.263] Using settings from "/var/transmission" (daemon.c:517)
[00:35:04.263] Saved "/var/transmission/settings.json" (bencode.c:1731)
[00:35:04.263] Port Forwarding (NAT-PMP) initnatpmp succeeded (0) (natpmp.c:72)
[00:35:04.263] Port Forwarding (NAT-PMP) sendpublicaddressrequest succeeded (2) (natpmp.c:72)
[00:35:12.337] Port Forwarding Port Forwarding (port-forwarding.c:93)
[00:35:12.337] Port Forwarding Port Forwarding (port-forwarding.c:93)
[00:35:37.568] DHT Attempting bootstrap from dht.transmissionbt.com (tr-dht.c:247)
