However, for the purposes of this article, Tier 1 storage will refer to the storage tier with the highest performance. The phrase “Tier 1 data storage” sometimes causes confusion, because increasingly, the top layer in the tiered storage hierarchy is being referred to as Tier 0, thanks to the rise of technologies such as storage class memory and flash. This kind of tier data management system software may be a standalone solution, part of a cloud storage gateway, or part of a single storage system. Most tiered storage systems deploy automated storage tiering, moving data through the tiers automatically as it moves through its lifecycle, cooling. Cold data like this should be stored based on low cost, with access times of minutes or hours.Įxcept for very small businesses, manual storage tiering is almost always too impractical and time consuming to work well. Perhaps there are regulatory reasons to keep it, or it might be unstructured data that has big data mining uses in the future. At this level, cost becomes the more important consideration, subject to a threshold for minimum performance.Ĭold data. This sort of data has to be retained, but it may never be accessed again. Warm data. This data is typically a few days old, and includes data on completed transactions and emails from days past-things that are used less frequently, but still must remain readily accessible. At this tier performance is still very important, but cost is also a factor. Data like this runs email, and applications such as ERP or CRM-anything the organization’s everyday operations depend on. Hot data. This data class is in constant use, so it demands a relatively high level of tiered storage. Inability to access this kind of mission critical data means poor performance, lost business, delays, and other problems that negatively impact profitability. Mission critical data. This data must always be stored at the highest tier because it supports high-speed applications such as customer transactions. Typical tiered storage data classes include:
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