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VPS介紹 – Letbox

Posted By wHOaMi On 2019 年 10 月 20 日 @ 下午 1:56 In 網站建設 | No Comments

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內容目錄

📦 爆量首選！Letbox NVMe + Block Storage 超高 CP 值方案開箱

🔥 站長老實說懶人包：
Letbox ^[9] 是 LET ^[10] 上面最近相當火紅的主機提供商，熱度破表！因為他們推出了超便宜的 NVMe + Block Storage 大容量組合方案，我也手刀買了一個來嘗鮮一下 😎。

測試結果只能說 CP 值突破天際！年付 $84 美金就能擁有 1Gbps 網速與高達 3TB (SAS) 大硬碟的 VPS，真的是便宜到爆了。唯一美中不足的是 CPU 有 30% 效能限制，所以文章下方也特別附上了限制 CPU 避免被封鎖的最佳化教學唷 👣。

💡 白話文教室：什麼是 Block Storage（區塊儲存）？
想像你買了一支內建容量很小的智慧型手機（NVMe 系統碟），用來跑作業系統非常快。而 Block Storage 就像是你額外插上去的一顆 3TB 超大容量外接隨身碟（HDD 資料碟）。
這套方案最迷人的地方就在於：系統運作極快，同時又擁有海量空間可以存放大型檔案（如下載影片、備份檔）！

🟦 🟦 🟦

🛠️ 效能封印解除：系統分區與最佳化教學

步驟一：新增 Block Storage 分區並格式化掛載

💡 白話文教室：為什麼要 fdisk 跟 mkfs.ext4？
這就像是你剛買下一塊巨大的新土地（原始的 3TB 硬碟）。
首先，你必須請測量員來畫線拉封鎖線，決定這塊地有多大（這就是 fdisk / gdisk 建立磁碟分割區）。接著，你必須請工程團隊來鋪設水泥地基與馬路，讓房子可以安穩蓋在上面（這就是 mkfs.ext4 格式化）。最後，在大門口掛上門牌，讓大家都知道從哪裡進去（這就是 mount 掛載到目錄）。

❶ 首先在官網後台 Services 頁籤下進入 My Services，然後點入已購買的 Product。接著在 Manage Product 頁面點擊左側 Actions 裡的 Upgrade/Downgrade Options，找到 Additional Disks Space Block Storage UP to 400MB/s 下拉框，選取已購買的磁碟容量，點擊 Click to Continue。
❷ 參考官網Wiki – How to Add Block Storage Disk? ^[11]，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！新增好分區之後請重開機。

Letbox_bus_virtio — ⚠️ 陷阱注意：千萬別選錯 Bus 與 Format 唷！

❸ 重開機後，使用 fdisk -l /dev/vdb 應該能看到系統已經成功抓到了新的分區，名稱叫做 /dev/vdb。
❹ 使用 gdisk /dev/vdb 指令，準備進行分割。請直接對照下方終端機畫面操作：

# Command (? for help): n ### 輸入n
Partition number (1-128, default 1): 1 ### 輸入1
First sector (…) or {+-}size{KMGTP}: ### 直接按ENTER
Last sector (…) 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’

❺ 承接上方，接著將設定寫入分區表：

# 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.

❻ 承接上方，剛剛已經處理好 GPT 分割表了，接著就將這塊大土地格式化，然後掛載到 /data 資料夾吧！ 😎

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

此時終端機應該會顯示出新的 Block Storage 狀態：

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

❼ 最後一步，編輯 /etc/fstab 系統檔案，讓伺服器每次重新開機時，都會自動幫你掛載好 /dev/vdb1：

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

步驟二：利用 Systemd 限制 CPU 使用率 (避免被主機商停權)

這台主機最大的限制就是「CPU 長時間不能超過 30%」。為了避免不小心違規被主機商拔線，我們可以透過 Linux 系統內建的 Systemd 來戴上「緊箍咒」。
由於我主要拿來跑 BT 下載的 Transmission，其系統服務名稱叫做 transmission-daemon，你可以按自己的服務需求做變更 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 虛擬記憶體

💡 白話文教室：什麼是 Swap 虛擬記憶體？
你可以把實體記憶體（RAM）想像成你辦公的「桌面」。當你開了太多檔案，桌面放不下時怎麼辦？
Swap 就像是你辦公桌旁邊的「地板」。當桌面滿了，系統會暫時把不常用的資料放到地板上（硬碟 Swap 區），雖然從地板撿東西的速度比在桌面上慢很多，但至少能保證你的系統不會因為放不下而直接當機！

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

🟩 🟩 🟩

⚙️ 系統效能深度測試

由於 CPU 受到嚴格限制，所以這邊就沒有跑太多吃重的硬核測試啦 😎

測試項目	詳細報告 (點擊展開檢視)
📊 serverreview	💡 點擊展開完整 serverreview 測試報告 $ 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	💡 點擊展開完整 Speedtest Monster 測試報告 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

測試項目

詳細報告 (點擊展開檢視)

📊 serverreview

💡 點擊展開完整 serverreview 測試報告

$ 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

💡 點擊展開完整 Speedtest Monster 測試報告

 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

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🛒 嚴選推薦方案總覽 (Recommended Plans)

方案名稱	運算資源 (CPU/RAM)	硬碟空間 (Storage)	網路規格 (流量/頻寬)	費用 (月/年)	快速購買
💎 BBox 3TB 大容量款	Intel Xeon E5-2690 v2 @ 2 Core (30%限制) 2GB RAM	20GB NVMe SSD + 3TB HDD (SAS)	5TB流量 @ 1Gbps (超流降至10Mbps)	月租 $7 年租 $84	🛒 購買 ^[12] 📍 洛杉磯 LG ^[13] 📡 AS40676 ^[14]
🚀 DL1TB 高速讀寫款	2 Core 2GB RAM	1TB HDD (RAID10)	4TB流量 @ 1Gbps	月租 $6.7 年租 $60	🛒 購買 ^[15] 📍 達拉斯 LG ^[16] 📡 AS40676 ^[14]
⚡ BBox 2048 輕量組合款	2 Core (30%限制) 2GB RAM	20GB NVMe SSD + 500GB HDD (SAS)	3TB流量 @ 1Gbps	月租 $5.5 年租 $50	🛒 購買 ^[17] 📍 洛杉磯 LG ^[13] 📡 AS40676 ^[14]