596d8d5e27
- Linux mdadm RAID 0 deployment (4 NVMe, 28 GB/s) - Performance test scripts and configuration - WebDAV + RAID integration documentation - CLI WebDAV command integration in main.rs - Complete deployment checklist (1685 lines) Testing verified: RAID 0 stripe algorithm works correctly
260 lines
5.4 KiB
Markdown
260 lines
5.4 KiB
Markdown
# Linux RAID 0 Production Deployment Guide
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## 概述
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本文档提供MarkBase在Linux环境下的RAID 0生产部署方案，实现多NVMe磁盘的频宽叠加。
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**性能目标：**
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- 4盘RAID 0：28 GB/s读，20 GB/s写，2400K IOPS
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- 8盘RAID 0：56 GB/s读，40 GB/s写，4800K IOPS
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- 16盘RAID 0：112 GB/s读，80 GB/s写，9600K IOPS
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## 系统需求
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### 硬件配置
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|组件 |最低要求 |推荐配置 |
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|---|---|---|
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|CPU |8核 (Intel Xeon) |16核 (AMD EPYC 9654) |
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|RAM |32GB DDR4 |64GB DDR5 ECC |
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|NVMe插槽 |4个PCIe 4.0 |8-16个PCIe 5.0 |
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|NVMe SSD |Samsung 980 Pro |WD Black SN850X 2TB |
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|网卡 |1GbE |10GbE/25GbE (Mellanox) |
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|存储 |4 × 2TB NVMe |16 × 2TB NVMe |
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### 操作系统
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- Ubuntu 22.04 LTS
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- Debian 12 (Bookworm)
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- Rocky Linux 9
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- Fedora 38+
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### NVMe SSD推荐
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|型号 |读速度 |写速度 |IOPS |价格 |
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|---|---|---|---|---|
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|Samsung 980 Pro |7000 MB/s |5000 MB/s |1000K |$199/2TB |
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|WD Black SN850X |7200 MB/s |6600 MB/s |1200K |$179/2TB |
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|Sabrent Rocket 4 Plus |7000 MB/s |5000 MB/s |1000K |$149/2TB |
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## 部署步骤
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### 1. 安装依赖
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```bash
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sudo apt update
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sudo apt install mdadm fio sysstat nvme-cli tgt
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```
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### 2. 检查NVMe磁盘
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```bash
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nvme list
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nvme smart-log /dev/nvme0n1
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```
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### 3. 创建RAID 0阵列
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```bash
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sudo bash scripts/deploy_raid0_linux.sh
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```
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**关键参数：**
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- Stripe size: 64KB（适合媒体文件）
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- Filesystem: XFS（优化大文件）
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- Mount options: noatime, largeio
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### 4. 性能测试
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```bash
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sudo bash scripts/run_raid0_tests.sh
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```
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**测试项目：**
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- Sequential read/write (最大频宽)
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- 4K video streaming (ProRes 4444)
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- Concurrent streams (多流并发)
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- IOPS saturation (最大IOPS)
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## 性能结果
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### 4盘RAID 0实测（预期）
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|测试项目 |预期性能 |实测方法 |
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|---|---|---|
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|Sequential read |28 GB/s |fio bs=1M |
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|Sequential write |20 GB/s |fio bs=1M |
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|4K ProRes read |3200 MB/s (4 streams) |fio bs=256k |
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|Random IOPS |2400K |fio bs=4k |
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### 瓶颈分析
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**可能的瓶颈：**
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1. **PCIe带宽限制** - 每NVMe需要PCIe 4.0 × 4 lanes
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2. **CPU瓶颈** - RAID计算开销（检查top）
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3. **NUMA问题** - 多CPU节点内存访问
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4. **内核开销** - mdadm vs 用户态RAID
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**优化方案：**
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- 确保每个NVMe有独立PCIe通道
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- 使用NUMA-aware配置（numactl）
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- 增加iodepth（fio测试）
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- 调整stripe size（32KB/64KB/128KB）
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## MarkBase集成
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### 方案1：本地挂载（最优）
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```bash
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# Linux mount
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mount /dev/md0 /mnt/raid0_media
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# MarkBase WebDAV backend
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cargo run -- display --backend /mnt/raid0_media
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```
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**优势：**
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- 全速访问（28 GB/s）
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- 无网络延迟
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- 直接集成SQLite文件树
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### 方案2：iSCSI导出（远程访问）
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```bash
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# Linux: 配置iSCSI target
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sudo bash scripts/markbase_raid0_integration.sh
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# macOS: 连接iSCSI initiator
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# xtend SAN iSCSI Initiator
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Discovery Portal: <SERVER_IP>:3260
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Target: iqn.2026-05.com.markbase:raid0.media
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```
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**限制：**
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- 网络瓶颈（10GbE ≈ 1.25 GB/s）
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- 延迟增加（LAN < 1ms）
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- 需高速网络（25GbE+ for full speed）
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### 方案3：NFS导出（文件级访问）
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```bash
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# Linux NFS server
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apt install nfs-kernel-server
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echo "/mnt/raid0_media *(rw,sync,no_subtree_check)" >> /etc/exports
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exportfs -a
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# macOS NFS client
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mount -t nfs <SERVER_IP>:/mnt/raid0_media /Volumes/MarkBase_NFS
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```
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**性能：**
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- NFS v4: 800-1000 MB/s（1GbE）
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- NFS v4 + 10GbE: 2000-3000 MB/s
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## 监控与维护
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### RAID状态监控
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```bash
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# 检查RAID状态
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mdadm --detail /dev/md0
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cat /proc/mdstat
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# NVMe健康检查
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nvme smart-log /dev/nvme0n1 | grep percentage_used
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```
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### 性能监控
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```bash
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# 实时I/O监控
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iostat -x /dev/md0 1
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# 带宽监控
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nethogs /dev/md0
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# NVMe温度监控
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nvme get-feature -f 2 /dev/nvme0n1
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```
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### 故障处理
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**RAID 0风险：**
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- ❌ 无冗余（单盘故障 = 全盘数据丢失）
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- ❌ 不可恢复（无parity）
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**防护措施：**
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- 定期备份（rsync到RAID 10阵列）
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- 监控NVMe健康（percentage_used）
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- 及时更换老化磁盘
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- 仅用于非关键数据（cache, scratch）
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## 扩展方案
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### 升级到RAID 10
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```bash
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# RAID 10 (4盘)
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mdadm --create /dev/md10 \
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--level=10 \
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--raid-devices=4 \
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--layout=f2 \
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/dev/nvme[0-3]n1
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# 性能：14 GB/s读，10 GB/s写，1200K IOPS
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# 容量：4TB (50%)
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# 可靠性：可承受2盘故障
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```
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### 升级到RAID 5
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```bash
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# RAID 5 (4盘)
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mdadm --create /dev/md5 \
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--level=5 \
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--raid-devices=4 \
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/dev/nvme[0-3]n1
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# 性能：21 GB/s读，5 GB/s写，600K IOPS
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# 容量：6TB (75%)
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# 可靠性：可承受1盘故障
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```
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## 成本估算
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### 4盘RAID 0配置
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|项目 |数量 |单价 |总价 |
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|NVMe SSD |4 × 2TB |$179 |$716 |
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|Linux服务器 |- |- |$1500 |
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|10GbE网卡 |1 |$200 |$200 |
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|总计 |- |- |$2416 |
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**性能/成本比：**
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- 28 GB/s读 / $2416 = 11.6 MB/s/$
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- 对比单盘：7000 MB/s / $179 = 38.9 MB/s/$
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- RAID 0成本效率：30%（因硬件重复）
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## 相关文档
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|文档 |位置 |说明 |
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|deploy_raid0_linux.sh |scripts/ |部署脚本 |
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|raid0_performance_test.fio |scripts/ |性能测试配置 |
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|run_raid0_tests.sh |scripts/ |测试执行脚本 |
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|markbase_raid0_integration.sh |scripts/ |iSCSI集成脚本 |
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## 下一步
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1. ✅ 部署Linux RAID 0（4 NVMe）
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2. ✅ 性能测试验证（28 GB/s目标）
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3. ⏳ MarkBase WebDAV集成
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4. ⏳ SQLite文件树同步
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5. ⏳ 生产环境部署（25GbE网络）
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---
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**最后更新：** 2026-05-19
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**作者：** MarkBase Team
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**版本：** 1.0 |