大部分MongoDB部署都运行于多台服务器的集群中，相对于传统数据库，这增加了容量规划及配置方面的复杂性。系统架构师Chad Tindel 在MongoDB 世界大会 Power Efficiency Improvement1. SSDs like the Micron® ECO. In this technical brief, we compare these two MongoDB test clusters, each using the Linux® Logical Volume A storage engine is the part of a database that is responsible for managing how data is stored, both in memory and on disk. Many databases support multiple storage engines, With WiredTiger, MongoDB utilizes both the WiredTiger internal cache and the filesystem cache. Starting in MongoDB , the default WiredTiger internal cache size is the larger of either: 50% of (RAM - 1 GB), or. MB. For example, on a system with a total of 4GB of RAM the WiredTiger cache will use GB of RAM ( * (4 GB - 1 GB) = GB Selecting between SSD (Solid State Drive) and HDD (Hard Disk Drive) for data recovery involves trade-offs. SSDs offer faster read/write speeds, enhancing recovery performance The table below should give you a general idea of the performance difference between an SSD vs. HDD. An SSD is around four times faster than an HDD when it comes to read speed and slightly less when comparing write speed. However, using a more compatible SSD interface like PCIe can offer an even higher data rate
HDD vs SSD - which is the storage tech for you? | PC Gamer
Bottom Line: SSD vs. HDD speed. Solid-state drives are faster than hard drives overall, and they’re more suitable for high-performance workloads and rapid data processing needs. Enterprises with major applications that require a great deal of processing power should have SSD arrays in their data centers or offices If you’re looking to know the speed differences between an eMMC and an SSD, then on average an SSD is around mb/s faster. An eMMC has an average transfer speed of around mb/s. However, an SSD will have a much faster transfer speed than this – on average, even a cheaper SSD will have speeds of around mb/s And, that is in boot times. Games that are installed on an SSD will typically boot faster than games that are installed on a traditional hard drive. This boot time will vary from PC to PC and game to game, but in some instances booting a game from an SSD can take less than half the time it would take to boot it from a hard drive
MongoDB - Store Indexes on SSD & Data Collections on Magnetic?
Gitahjunkie • 8 yr. ago. HDD. Cheaper per Gb, easier to find higher capacities. Slower, performance that degrades over time, marginally heavier and noisier. SSD. Extremely fast relative to HDDs, silent and slightly lighter, less performance issues over time. Harder to find in low and mid tier laptops, more expensive per Gb Here are the definitions of an SSD vs. an HDD: SSD An SSD or solid state drive is a type of computer storage that uses flash memory, which makes it faster and more durable compared to hard disk drives. Unlike HDDs that have several physical components like magnetic heads, actuators and spinning platters, an SSD reads and writes data