VPS介紹 – Letbox

窮苦人家的小孩 2019 年 10 月 20 日網站建設發表留言 35 點擊數

Letbox是LET上面最近相當火紅的主機提供商，熱到爆，因為他們推出了超便宜的NVMe + Block Storage的方案，我也手刀買了一個嘗鮮一下 ? ? ?

測試結果只能說超有CP值der ? 年租費$84美金可以租到是網速1Gbps、3TB (SAS)硬碟的VPS真的便宜到爆了，唯一美中不足的是CPU限制只能用30%，所以這邊也有附上相關的解決辦法 ? ? ?

處理辦法

步驟一

新增Block Storage的分區，並且GPT格式化後掛載

1. 首先在官網後台Services的頁籤下進入My Services，然後進入已購買的Product，接著在Manage Product的頁面點擊左手邊Actions選項裡面的Upgrade/Downgrade Options，然後找到Additional Disks Space Block Storage UP to 400MB/s這邊的下拉框，選取已購買的磁碟空間容量再點擊最下方的Click to Continue。

2. 參考官網Wiki – How to Add Block Storage Disk?，按圖索驥，這邊只需要特別注意Add Hard Disk的Bus務必選VIRTIO，Format務必選raw，新增好分區之後就重開機。

3A. 重開機後使用fdisk應該能看到抓到了新的分區叫做/dev/vdb，然後用gdisk來做格式化fdisk -l /dev/vdb

3B. 使用gdisk指令，然後按照紅色字的說明操作gdisk /dev/vdb

# Command (? for help): n ### 輸入n
Partition number (1-128, default 1): 1 ### 輸入1
First sector (34-6291455966, default = 2048) or {+-}size{KMGTP}: ### 直接按ENTER
Last sector (2048-6291455966, default = 6291455966) or {+-}size{KMGTP}: ### 直接按ENTER
Current type is ‘Linux filesystem’
Hex code or GUID (L to show codes, Enter = 8300): 8300 ### 直接按ENTER
Changed type of partition to ‘Linux filesystem’

3C. 承接上方，一樣按照紅色字的說明來操作

# Command (? for help): w ### 輸入w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

# Do you want to proceed? (Y/N): Y ### 輸入Y
OK; writing new GUID partition table (GPT) to /dev/vdb.
The operation has completed successfully.

3D. 承接上方，剛剛已經處理好GPT了，接著就格式化然後掛載到/data此資料夾吧 ?

mkfs.ext4 /dev/vdb1
mkdir -p /data/
mount /dev/vdb1 /data
df -hT

此時應該會顯示出新的Block Storage ? ? ?

Filesystem     Type      Size  Used Avail Use% Mounted on
devtmpfs       devtmpfs  909M     0  909M   0% /dev
tmpfs          tmpfs     919M     0  919M   0% /dev/shm
tmpfs          tmpfs     919M  8.6M  911M   1% /run
tmpfs          tmpfs     919M     0  919M   0% /sys/fs/cgroup
/dev/vda1      ext4       20G  2.2G   17G  12% /
tmpfs          tmpfs     184M     0  184M   0% /run/user/0
/dev/vdb1      ext4      2.9T   89M  2.8T   1% /data

3E. 編輯/etc/fstab，讓開機時自動掛載/dev/vdb1 ?

echo /dev/vdb1 /data ext4 defaults 0 0 >> /etc/fstab

步驟二

利用Systemd來限制CPU使用率，由於我安裝了transmission，其服務名稱叫做transmission-daemon，所以可以按自己的需求做變更der ? ? ?

systemctl set-property transmission-daemon CPUQuota=30%
systemctl set-property transmission-daemon MemoryLimit=512M
systemctl show transmission-daemon | grep CPUQuota
systemctl daemon-reload

步驟三

新增1GB的swap

dd if=/dev/zero of=/root/swapfile bs=1M count=1024
mkswap /root/swapfile
chmod 600 /root/swapfile
swapon /root/swapfile
echo /root/swapfile swap swap defaults 0 0 >> /etc/fstab
swapon -s
free -m

效能測試

由於CPU限制，所以沒有做太多 ? ? ?

serverreview
Speedtest Monster

$ bench.sh -a share clbin

 Benchmark started on 17-Oct-2019 17:32:53

 ## System Information

 OS Name     : CentOS Linux release 7.7.1908 (Core) N (64 bit)
 Kernel      : KVM / 5.3.6-1.el7.elrepo.x86_64
 CPU Model   : Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz
 CPU Cores   : 2 cores @  2999.998 MHz
 CPU Cache   : 16384 KB
 Total RAM   : 1989 MiB (Free 1735 MiB)
 Total SWAP  : SWAP not enabled
 Total Space : 21GB (11% used)
 Running for : 2 minutes 4 seconds

 ## CDN Speedtest

 CacheFly : 113.71 MiB/s |  909.66 Mbps  | ping   0.255ms
 Gdrive   :  17.92 MiB/s |  143.33 Mbps  | ping   0.328ms

 ## North America Speedtest

 Softlayer, Washington, USA :   5.61 MiB/s |   44.90 Mbps  | ping  58.387ms
 SoftLayer, San Jose, USA   :  45.88 MiB/s |  367.02 Mbps  | ping   8.508ms
 SoftLayer, Dallas, USA     :  15.17 MiB/s |  121.37 Mbps  | ping  29.753ms
 Vultr, New Jersey, USA     :  32.57 MiB/s |  260.57 Mbps  | ping  62.675ms
 Vultr, Seattle, USA        :  82.07 MiB/s |  656.54 Mbps  | ping  25.408ms
 Vultr, Dallas, USA         :  78.75 MiB/s |  630.01 Mbps  | ping  29.895ms
 Vultr, Los Angeles, USA    : 106.08 MiB/s |  848.63 Mbps  | ping   0.302ms
 Ramnode, New York, USA     :   6.96 MiB/s |   55.69 Mbps  | ping  58.347ms
 Ramnode, Atlanta, USA      :  10.90 MiB/s |   87.21 Mbps  | ping  51.762ms
 OVH, Beauharnois, Canada   :   2.84 MiB/s |   22.72 Mbps  | ping  67.645ms

 ## Europe Speedtest

 Vultr, London, UK            :  13.09 MiB/s |  104.73 Mbps  | ping 144.698ms
 LeaseWeb, Frankfurt, Germany :  14.17 MiB/s |  113.34 Mbps  | ping 140.308ms
 Hetzner, Germany             :  10.64 MiB/s |   85.10 Mbps  | ping 150.584ms
 Ramnode, Alblasserdam, NL    : 435.29 KiB/s |    3.40 Mbps  | ping 144.014ms
 Vultr, Amsterdam, NL         :  13.08 MiB/s |  104.64 Mbps  | ping 143.711ms
 EDIS, Stockholm, Sweden      :     326 B/s |      N/A       | ping 157.403ms
 OVH, Roubaix, France         :  11.33 MiB/s |   90.60 Mbps  | ping 138.396ms
 Online, France               :  13.58 MiB/s |  108.63 Mbps  | ping 142.876ms
 Prometeus, Milan, Italy      :   6.62 MiB/s |   52.95 Mbps  | ping 152.903ms

 ## Exotic Speedtest

 Sydney, Australia     :   9.49 MiB/s |   75.88 Mbps  | ping 150.902ms
 Lagoon, New Caledonia :   4.13 MiB/s |   33.07 Mbps  | ping 172.570ms
 Hosteasy, Moldova     : 216.44 KiB/s |    1.69 Mbps  | ping 195.281ms
 Prima, Argentina      : 297.24 KiB/s |    2.32 Mbps  | ping error!

 ## Asia Speedtest

 SoftLayer, Singapore : 271.19 KiB/s |    2.12 Mbps  | ping 176.582ms
 Linode, Tokyo, Japan :  18.87 MiB/s |  151.00 Mbps  | ping 116.777ms
 Linode, Singapore    :   9.37 MiB/s |   74.94 Mbps  | ping 167.529ms
 Vultr, Tokyo, Japan  :  18.87 MiB/s |  150.92 Mbps  | ping 108.465ms

 ## IO Test

 CPU Speed:
    bzip2 512MB -   104 MB/s
   sha256 512MB -   291 MB/s
   md5sum 512MB -   526 MB/s

 Disk Speed (512MB):
   I/O Speed  - 1.4 GB/s
   I/O Direct - 534 MB/s

 RAM Speed (1024MB):
   Avg. write - 2628.3 MB/s
   Avg. read  - 6007.5 MB/s

 Benchmark finished in 120 seconds

 Speedtest Monster v.1.4.5 2019-10-13 
 Region: Global  https://bench.monster/speedtest.html
 Usage : curl -LsO bench.monster/speedtest.sh; bash speedtest.sh -Global

---------------------------------------------------------------------------
 OS           : CentOS 7.7.1908 (64 Bit)
 Virt/Kernel  : KVM / 5.3.6-1.el7.elrepo.x86_64
 CPU Model    : Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz
 CPU Cores    : 2 @ 2999.998 MHz x86_64 16384 KB Cache
 CPU Flags    : AES-NI Enabled & VM-x/AMD-V Enabled
 Load Average : 0.06, 0.05, 0.01
 Total Space  : 20G (2.5G ~14% used)
 Total RAM    : 106 MB / 1989 MB (459 MB Buff)
 Total SWAP   : 0 MB / 0 MB
 Uptime       : 0 days 0:5
---------------------------------------------------------------------------
 ASN & ISP    : AS40676, FranTech Solutions
 Organization : LETBOX
 Location     : Los Angeles, United States / US
 Region       : California
---------------------------------------------------------------------------

 ## Geekbench v4 CPU Benchmark:

  Single Core : 3157  (VERY GOOD)
   Multi Core : 5803

 ## IO Test

 CPU Speed:
    bzip2     : 105 MB/s
   sha256     : 299 MB/s
   md5sum     : 530 MB/s

 RAM Speed:
   Avg. write : 2696.5 MB/s
   Avg. read  : 6109.9 MB/s

 Disk Write Speed:
   1st run    : 1.2 GB/s
   2dn run    : 1.4 GB/s
   3rd run    : 1.4 GB/s
   -----------------------
   Average    : 1365.3 MB/s

 ## Global Speedtest

 Location                       Upload           Download         Ping   
---------------------------------------------------------------------------
 Speedtest.net                  406.85 Mbit/s    497.56 Mbit/s    33.057 ms
 USA, New York (AT&T)           239.17 Mbit/s    297.92 Mbit/s    60.775 ms
 USA, Chicago (Windstream)      328.15 Mbit/s    568.59 Mbit/s    52.640 ms
 USA, Dallas (Frontier)         407.62 Mbit/s    676.93 Mbit/s    39.606 ms
 USA, Miami (Frontier)          273.29 Mbit/s    457.50 Mbit/s    63.979 ms
 USA, Los Angeles (Spectrum)    628.83 Mbit/s    976.07 Mbit/s     3.890 ms
 UK, London (Community Fibre)   138.52 Mbit/s    312.20 Mbit/s   141.308 ms
 France, Lyon (SFR)             68.49 Mbit/s     211.45 Mbit/s   157.436 ms
 Germany, Berlin (DNS:NET)      121.18 Mbit/s    265.89 Mbit/s   165.563 ms
 Spain, Madrid (Adamo)          98.07 Mbit/s     171.69 Mbit/s   193.795 ms
 Italy, Rome (Unidata)          124.79 Mbit/s    227.31 Mbit/s   160.632 ms
 Russia, Moscow (MTS)           94.05 Mbit/s     198.46 Mbit/s   179.952 ms
 Israel, Haifa (013Netvision)   87.95 Mbit/s     191.47 Mbit/s   195.573 ms
 India, New Delhi (Airtel)      28.94 Mbit/s     12.69 Mbit/s    249.331 ms
 Singapore (FirstMedia)         68.95 Mbit/s     21.15 Mbit/s    168.465 ms
 Japan, Tsukuba (SoftEther)     170.07 Mbit/s    274.26 Mbit/s   104.426 ms
 Australia, Sydney (Yes Optus)  117.92 Mbit/s    60.62 Mbit/s    159.013 ms
 RSA, Randburg (Cool Ideas)     19.59 Mbit/s     104.13 Mbit/s   303.960 ms
 Brazil, Sao Paulo (Criare)     110.61 Mbit/s    238.06 Mbit/s   169.909 ms
---------------------------------------------------------------------------

 Timestamp   : 2019-10-17 09:45:45 UTC