In the latest episode of the podcast, the search large’s Gary Illyes revealed that the corporate’s search index makes use of a tiered system the place costlier storage is used to index the most well-liked content material sooner.
Based on Illyes, Google indexes content material utilizing three several types of storage. RAM is the quickest and most costly storage kind utilized by the corporate adopted by stable state drives (SSDs) that are quick however price prohibitive and arduous disk drives (HDDs) as they’re the slowest and least pricey.
RAM is used to index paperwork that will likely be served regularly in search outcomes whereas the opposite two storage sorts are used for content material that seems much less usually in Google’s search engine.
Google’s search index
Illyes supplied additional particulars on how Google decides which storage kind its index is saved on within the newest episode of the Search Off the File podcast titled “Language complexities in Search index selection and more!”, saying:
“So for instance, for paperwork that we all know that could be surfaced each second, for instance, they’ll find yourself on one thing tremendous quick. And the tremendous quick could be the RAM. Like a part of our serving index is on RAM. Then we’ll have one other tier, for instance, for stable state drives as a result of they’re quick and never as costly as RAM. However nonetheless not– the majority of the index wouldn’t be on that. The majority of the index could be on one thing that’s low-cost, accessible, simply replaceable, and doesn’t break the financial institution. And that might be arduous drives or floppy disks.”
Now that we all know a bit extra about how Google builds its search index, some website house owners could also be contemplating attempting to enhance the SEO of their pages in order that they’re listed on RAM or SSDs to seem greater within the firm’s search outcomes. Sadly although, there’s now approach to inform which storage tier particular person websites are listed on.
Whereas Google is now storing content material that’s accessed each second on both RAM or SSDs, a majority of its search index continues to be saved on HDDs. Nevertheless, this might change sooner or later as these costlier storage sorts come down in value.
By way of Search Engine Journal