add snapshot stress test

Author: williamstein

src/packages/file-server/btrfs/test/subvolume-stress.test.ts

@@ -0,0 +1,41 @@
+import { before, after, fs, sudo } from "./setup";
+import { readFile, writeFile, unlink } from "fs/promises";
+import { join } from "path";
+import { wait } from "@cocalc/backend/conat/test/util";
+import { randomBytes } from "crypto";
+
+beforeAll(before);
+//const log = console.log;
+const log = (..._args) => {};
+
+describe("stress test creating many snapshots", () => {
+  let vol;
+  it("creates a volume and write a file to it", async () => {
+    vol = await fs.subvolume("stress");
+  });
+
+  const count = 25;
+  it(`create file and snapshot the volume ${count} times`, async () => {
+    const snaps: string[] = [];
+    const start = Date.now();
+    for (let i = 0; i < count; i++) {
+      await writeFile(join(vol.path, `${i}.txt`), "world");
+      await vol.createSnapshot(`snap${i}`);
+      snaps.push(`snap${i}`);
+    }
+    log(
+      `created ${Math.round((count / (Date.now() - start)) * 1000)} snapshots per second in serial`,
+    );
+    snaps.sort();
+    expect(await vol.snapshots()).toEqual(snaps);
+  });
+
+  it(`delete our ${count} snapshots`, async () => {
+    for (let i = 0; i < count; i++) {
+      await vol.deleteSnapshot(`snap${i}`);
+    }
+    expect(await vol.snapshots()).toEqual([]);
+  });
+});
+
+afterAll(after);

src/packages/file-server/btrfs/test/subvolume.test.ts

@@ -87,8 +87,11 @@ describe("test snapshots", () => {
     expect(await vol.snapshotExists("snap1")).toBe(false);
     expect(await vol.snapshots()).toEqual([]);
   });
-
-
 });
 
+// describe("test bup backups", ()=>{
+//   let vol;
+//   it('creates a volume')
+// })
+
 afterAll(after);