Синьчуаньский сервер | Поставщик оборудования для корпоративных серверов
The Storage Architecture That Saves $70,000 per Rack Without Sacrificing Performance
An all-NVMe storage array delivering 100 TB of usable capacity costs roughly $50,000 in drives alone. A tiered architecture delivering the same 100 TB costs roughly $18,000 in drives while delivering 85-90 percent of the performance for 95 percent of workloads. Across a five-rack deployment, то есть $180,000 in total savings.
The Three Tiers
| Tier | Тип привода | Example Model | Количество | Полезная емкость | Расходы (Drives Only) |
|---|---|---|---|---|---|
| Tier 0: Кэш | NVMe PCIe 4.0, 3 ДВПД, 3.84ТБ | Samsung PM9A3 3.84TB | 4 (RAID 10) | 7.68 ТБ | $2,800 |
| Tier 1: Active Data | SAS SSD 12Gb/s, 3 ДВПД, 3.84ТБ | Kingston DC1500M 3.84TB | 8 (RAID 10) | 15.36 ТБ | $5,600 |
| Tier 2: Bulk Capacity | SAS HDD 12Gb/s, 20ТБ | Тошиба МГ10 20 ТБ | 12 (RAID 6) | 160 ТБ можно использовать | $4,800 |
| Общий | 24 диски | 183 ТБ можно использовать | $13,200 | ||
Automated vs Manual Storage Tiering
Approach A: Automated Tiering (ZFS, Складские помещения, vSAN). ZFS with a Special Allocation Class on NVMe, a primary pool on SAS SSDs, and a secondary pool on SAS HDDs. Hot blocks migrate to the fastest tier automatically based on access frequency. No manual management required.
Approach B: Manual Classification. The DBA places the database WAL on NVMe (Tier 0), data files on SAS SSD (Tier 1), and backups on SAS HDD (Tier 2). Better performance predictability, but requires ongoing manual management.
Server Configuration: A Tiered Storage Node
| Компонент | Выбор | Причина |
|---|---|---|
| Сервер | Делл Р760 (2U, 24х 2,5 дюйма) | Sufficient bays for all three tiers |
| Альтернатива (более высокая плотность) | xFusion 2288H V7 (25х 2,5 дюйма, 28 NVMe) | More NVMe bays for larger Tier 0 кеш |
| Процессор | 2х Xeon Gold 6448Y (32 ядра) | Filesystem operations. No GPU needed. |
| Память | 256 ГБ (16Икс 16 ГБ DDR5, 1ЦОД) | ZFS ARC: 128 GB for metadata and hot block caching |
| RAID/HBA | МИНУТА H965i (16-порт Gen5 трехрежимный) | Один контроллер для NVMe, SSD-накопитель SAS, and SAS HDD |
| сеть | 2x 25GbE SFP28 (front-end), 2х 100ГбЕ (back-end) | 25GbE for client access, 100GbE for replication |
| ОС | TrueNAS Scale or RHEL 9 with ZFS | ZFS for tiering. TrueNAS for appliance experience. |
Performance Estimates: 183 TB Tiered Storage
| Рабочая нагрузка | Expected Performance | vs All-NVMe |
|---|---|---|
| 4K Случайное чтение (Tier 0 кеш) | ~850K IOPS, 80 us latency | 92 percent of all-NVMe |
| 4K Случайное чтение (Tier 1 active data) | ~95K IOPS, 120 us latency | Consistent SAS SSD performance |
| 4K Случайное чтение (Tier 2 холодные данные) | ~150 IOPS, 4ms latency | Sequential prefetch mitigates random penalty |
| Последовательная запись (to NVMe cache) | ~3.5 GB/s (4x NVMe RAID 10) | Writes on NVMe, async destage to slower tiers |
Three Deployment Scenarios
1. VMware Datastore (50 Виртуальные машины, mixed workloads). NVMe cache absorbs 80 percent of reads. SAS SSD handles active VMDKs. SAS HDD stores snapshots and templates. VMware admins experience NVMe-like latency with 60 percent lower storage cost.
2. PostgreSQL Database (2 ТБ, write-heavy OLTP). WAL on NVMe (Tier 0, зеркальный). Data files on SAS SSD (RAID 10). Backups on SAS HDD (RAID 6). WAL writes at 2 GB/s sustained, data reads at 95K IOPS.
3. Media Post-Production NAS (50 TB active, 150 TB archive). Current projects on SAS SSD. Completed archives on SAS HDD. NVMe cache for metadata and small-file I/O.
Design Your Tiered Storage With Xincuan
We supply all three storage tiers with factory-direct pricing, 3-год гарантии, и доставка по всему миру. Our storage architects can design a tiered deployment for your workload.
Request a tiered storage design consultation
Storage products: SSD | жесткие диски | Storage Solutions